%I A027999
%S A027999 1,0,1,3,6,13,24,49,91,181,334,632,1163,2138,3880,7006,
%T A027999 12531,22279,39369,69078,120597,209282,361405,620829,1061687,
%U A027999 1807014,3062642,5168784,8688820,14549659,24274226,40353748
%N A027999 Expansion of Product(1+q^m)^(m(m-1)/2); m=1..inf.
%Y A027999 Sequence in context: A001452 A005405 A000219 this_sequence A005196 A032287 
               A006017
%Y A027999 Adjacent sequences: A027996 A027997 A027998 this_sequence A028000 A028001 
               A028002
%K A027999 nonn
%O A027999 0,4
%A A027999 N. J. A. Sloane (njas(AT)research.att.com).