RE: Triangular Numbers – The Triangular Matchstick numbers on OEIS

Last week I made a post about Triangular Numbers. I posted a request for a new integer sequence on OEIS, which eventually got merged with an existing sequence, The Triangular Matchstick Numbers: https://oeis.org/A045943.

I love math.

Here are the Triangular Matchstick Number Formulas:

Recurrence Relation:

a(0) = 0
a(n) = a(n-1) + 3*n

Generating Function:

a(n) = 3*n
---------
(1-n)^3

tags: geeky math