004: Triangular

Happy Pi Day! https://en.wikipedia.org/wiki/Pi email: [email protected]

https:://mathworld.wolfram.com/LeibnizHarmonicTriangle.html email: [email protected]

 https://www.quora.com/What-are-some-interesting-numbers-series-sequences-to-learn-play-with Paper: https://cpsc.yale.edu/sites/default/files/files/tr1508.pdf email: [email protected]

https://en.wikipedia.org/wiki/Kolakoski_sequence email: [email protected]

https://mathworld.wolfram.com/OddNumber.html e-mail: [email protected]

https://mathworld.wolfram.com/EvenNumber.html e-mail: [email protected]

https://dungeonsdragons.fandom.com/wiki/Dice#d20

https://mathworld.wolfram.com/FibonacciNumber.html e-mail: [email protected]

https://en.wikipedia.org/wiki/Triangular_number

Email: [email protected] Youtube: https://www.youtube.com/channel/UCp1gAmvcd1iHSB8Nku7UccQ www.numbers.stream