OFFSET
0,3
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..100
MATHEMATICA
max = 35; se = Series[ Sum[ Log[1 - x^(n - k)*y^k], {n, 1, 2max}, {k, 0, n}], {x, 0, 2max}, {y, 0, 2max}]; coes = CoefficientList[ Series[ Exp[-se], {x, 0, 2max}, {y, 0, 2max}], {x, y}]; a[n_] := coes[[ Ceiling[(n+2)/2], Floor[(n+2)/2] ]]; Table[a[n], {n, 0, max} ](* Jean-François Alcover, Dec 06 2011 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Christian G. Bower, Jan 08 2004
STATUS
approved