1,2

Table of n, a(n) for n=1..50.

Eric Weisstein's World of Mathematics, Tetrahedral Number

Cf. A000292, A274046, A279278, A350206.

Sequence in context: A044748 A171473 A158586 * A267565 A330230 A330233

Adjacent sequences: A350202 A350203 A350204 * A350206 A350207 A350208

nonn

Ilya Gutkovskiy, Dec 19 2021

approved