OFFSET
0,4
LINKS
Nathaniel Johnston, Table of n, a(n) for n = 0..60
FORMULA
G.f.: A(x/(1-x)) where A(x) is g.f. for A121933.
MAPLE
n:=20: t:=taylor(sum(sum((-1)^(s-k)*binomial(s, k)*((1+x/(1-x))^(k-1)-1)^k*((1+x/(1-x))^k-1)^(s-k), k=0..s), s=0..n), x, n+1): seq(coeff(t, x, s), s=0..n); # Nathaniel Johnston, Apr 28 2011
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Vladeta Jovovic, Sep 06 2006
STATUS
approved