Integer sequences | Factorial and binomial topics

Doubly triangular number

In mathematics, the doubly triangular numbers are the numbers that appear within the sequence of triangular numbers, in positions that are also triangular numbers. That is, if denotes the th triangular number, then the doubly triangular numbers are the numbers of the form . (Wikipedia).

Doubly triangular number
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PPE HP2Q4

Triangular numbers, Venn diagrams and probability.

From playlist PIXL PPE Paper 2 June 2016 Higher Tier AQA Style Worked Solutions

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Polygonal Numbers - Geometric Approach & Fermat's Polygonal Number Theorem

I created this video with the YouTube Video Editor (http://www.youtube.com/editor)

From playlist ℕumber Theory

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#MegaFavNumbers: 258,474,216

#MegaFavNumbers: 258,474,216. See https://www.youtube.com/watch?v=R2eQVqdUQLI&list=PLar4u0v66vIodqt3KSZPsYyuULD5meoAo. Further reading: The OEIS for the sequence: https://oeis.org/A001219 Another relevant sequence: https://oeis.org/A097571 S. P. Mohanty, Which triangular numbers are prod

From playlist MegaFavNumbers

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Squaring Numbers with Digits of 1

#shorts This video shows a pattern when squaring number with digits of 1.

From playlist Math Shorts

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Square numbers

Powered by https://www.numerise.com/ Square numbers

From playlist Indices, powers & roots

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Determine Approximate Values of Square Roots (Irrational Values)

This video explains how to determine what integer values a square root is between. Then it explains how to use a calculator to approximate square roots. http://mathispower4u.com

From playlist Geometry and Measurement

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Alternate minimization algorithms for scaling problems, and their analysis - Rafael Oliveira

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From playlist Mathematics

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Evil or Amazing?

Properties of 666 In this video, I will discuss some really cool properties of the number 666. Usually seen as an evil number, it's actually pretty cool! See what 666 has to do with magic squares YouTube channel: https://youtube.com/drpeyam TikTok: https://www.tiktok.com/@drpeyam Instagr

From playlist Random fun

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Allan MacDonald: "Electronic and optical properties of 2D moiré superlattices"

Theory and Computation for 2D Materials "Electronic and optical properties of 2D moiré superlattices" Allan MacDonald Institute for Pure and Applied Mathematics, UCLA January 15, 2020 For more information: http://www.ipam.ucla.edu/tcm2020

From playlist Theory and Computation for 2D Materials 2020

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2020.05.14 Jack Hanson - Critical first-passage percolation (part 2)

Part 1: background and behaviour on regular trees Part 2: limit theorems for lattice first-passage times For many lattice models in probability, the high-dimensional behaviour is well-predicted by the behaviour of a corresponding random model defined on a regular tree. Rigorous results

From playlist One World Probability Seminar

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!!Con 2019 - We Love Polyhedra! (And So Should You!) by Nat Alison

!!Con 2019 - We Love Polyhedra! (And So Should You!) by Nat Alison For millennia, mathematicians have marveled at the beauty of polyhedra, the most fundamental of 3D shapes. For years I have admired and researched these figures, and now it is time to me to present my findings. Through the

From playlist !!Con 2019

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Beyond Developable: Computational Design and Fabrication with Auxetic Materials (SIGGRAPH 2016)

SIGGRAPH 2016 Technical Paper by Mina Konakovic, Keenan Crane, Bailin Deng, Sofien Bouaziz, Daniel Piker, Mark Pauly webpage: http://lgg.epfl.ch/publications/2016/BeyondDevelopable/index.php We present a computational method for interactive 3D design and rationalization of surfaces via a

From playlist Research

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Lec 16 | MIT 18.085 Computational Science and Engineering I

Dynamic estimation: Kalman filter and square root filter A more recent version of this course is available at: http://ocw.mit.edu/18-085f08 License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu

From playlist MIT 18.085 Computational Science & Engineering I, Fall 2007

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James Freitag, University of Illinois at Chicago

March 29, James Freitag, University of Illinois at Chicago Not Pfaffian

From playlist Spring 2022 Online Kolchin seminar in Differential Algebra

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What are the trigonometric definitions of a right triangle

👉 Learn all about the trigonometry of right triangles. A right triangle is a triangle that has 90 degrees as one of its angles. The trigonometric identities of right triangles give us the relationship between the angles of a right triangle and the side lengths of the right triangle. These

From playlist Right Triangle Trigonometry | Learn About

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Odd Squares as Difference of Triangular Numbers (visual proof)

This is a short, animated visual proof demonstrating how to visualize odd squares as the difference of two triangular numbers. #mathshorts​ #mathvideo​ #math​ #numbertheory #mtbos​ #manim​ #animation​ #theorem​ #pww​ #proofwithoutwords​ #visualproof​ #proof​ #iteachmath #squares #triangula

From playlist Triangular Numbers

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Curved Hecke categories - Shotaro Makusumi

Virtual Workshop on Recent Developments in Geometric Representation Theory Topic: Curved Hecke categories Speaker: Shotaro Makusumi Affiliation: Columbia University; Member, School of Mathematics Date: November 20, 2020 For more video please visit http://video.ias.edu

From playlist Virtual Workshop on Recent Developments in Geometric Representation Theory

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The Drinfeld-Sokolov reduction of admissible representations of affine Lie algebras - Gurbir Dhillon

Workshop on Representation Theory and Geometry Topic: The Drinfeld--Sokolov reduction of admissible representations of affine Lie algebras Speaker: Gurbir Dhillon Affiliation: Yale University Date: April 03, 2021 For more video please visit http://video.ias.edu

From playlist Mathematics

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A Maths Puzzle: Find the nine digit number

Find a nine digit numbers, using the numbers 1 to 9, and using each number once without repeats, such that; the first digit is a number divisible by 1. The first two digits is a number divisible by 2; The first three digits is a number divisible by 3 and so on until we get a nine digit num

From playlist My Maths Videos

Related pages

Integer sequence | Floyd's triangle | Multigraph | Unordered pair | Triangular number | Square | Combinatorics | Orbital overlap | Mathematical chemistry | Quartic function