Annual Appeal: Please make a donation (tax deductible in USA) to keep the OEIS running. Over 4500 articles have referenced us, often saying "we would not have discovered this result without the OEIS".
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)
Table of n, a(n) for n=1..30.
Sequence in context: A230533 A235654 A118328 * A232903 A262757 A262477
Adjacent sequences: A079411 A079412 A079413 * A079415 A079416 A079417
nonn
Kit Vongmahadlek (kit119(AT)yahoo.com), Jan 07 2003
Edited by Don Reble (djr(AT)nk.ca), Nov 02 2005
approved