A307491 Numbers that are both centered triangular and tetrahedral.

1, 4, 10, 4960, 428536

Offset: 1

Author

Ilya Gutkovskiy, Apr 10 2019

Keywords

• nonn
• more

Comments

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

Links

• 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.