A307491 Numbers that are both centered triangular and tetrahedral.

1, 4, 10, 4960, 428536

Offset

1,2

Comments

If it exists, a(6) > 10^29. - Bert Dobbelaere, Apr 12 2019

Links

Table of n, a(n) for n=1..5.

Eric Weisstein's World of Mathematics, Centered Triangular Number

Eric Weisstein's World of Mathematics, Tetrahedral Number

Crossrefs

Intersection of A000292 and A005448.

Cf. A003556, A027568, A128862, A131750, A307492.

Sequence in context: A085649 A152396 A326720 * A356110 A048873 A091390

Adjacent sequences: A307488 A307489 A307490 * A307492 A307493 A307494

Keyword

nonn,more

Author

Ilya Gutkovskiy, Apr 10 2019

Status

approved