0,3

a(0) = 1, a(n) = (n^2-n)2^n/4 + n. a(n) = A002999(n) - n = A001815(n) + n. - Ralf Stephan (ralf(AT)ark.in-berlin.de), Sep 02 2003

Cf. A048482, A001787, A005183.

Sequence in context: A055218 A107307 A005492 this_sequence A117202 A137213 A027853

Adjacent sequences: A003010 A003011 A003012 this_sequence A003014 A003015 A003016

nonn

N. J. A. Sloane (njas(AT)research.att.com).