1,2

C. Rossiter, Depictions, Explorations and Formulas of the Euler/Pascal Cube.

a(n) = {(n*(1 + n)^2*(2 + n)*(-1 + n*(2 + n))*(-2 + 3*n*(2 + n)))/168}.

Cf. A000540.

Sequence in context: A129218 A046409 A128952 this_sequence A056468 A027785 A104673

Adjacent sequences: A101090 A101091 A101092 this_sequence A101094 A101095 A101096

easy,nonn

Cecilia Rossiter (cecilia(AT)noticingnumbers.net), Dec 15 2004

Edited by Ralf Stephan, Dec 16 2004