1,2

a(n) = n * sum_{k=0 to n-1} (-1)^k (2n-2k-1)^3

a(n+1) = (n+1) * ((2n+1)^3 - a(n)/n)

Sequence in context: A086860 A070147 A118328 this_sequence A005946 A000527 A100413

Adjacent sequences: A079411 A079412 A079413 this_sequence A079415 A079416 A079417

nonn

Kit Vongmahadlek (kit119(AT)yahoo.com), Jan 07 2003

Edited by Don Reble (djr(AT)nk.ca), Nov 02 2005