0,3

a:=n->sum(n^4-n^3, j=0..n): seq(a(n), n=0..20); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), May 08 2008

Sequence in context: A105946 A050222 A008655 this_sequence A104670 A138406 A042112

Adjacent sequences: A133751 A133752 A133753 this_sequence A133755 A133756 A133757

easy,nonn

Rolf Pleisch (r_pleisch(AT)gmx.ch), Mar 16 2008