OFFSET
0,2
FORMULA
EXAMPLE
PROG
(PARI) {a(n)=local(G=sum(m=0, n, binomial(2*m, m)*binomial(2*m+2, m+1)/(m+2)*x^m)+x*O(x^n)); polcoeff(x/serreverse(x*G^2), n)}
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Feb 05 2010
STATUS
approved