OFFSET
1,2
COMMENTS
Denominator of a(n)/(n*(2n-1)) = A006519(n).
PROG
(PARI) b(n, p)=sum(k=0, n, (p)^k*binomial(2*k, k)*binomial(n+k, n-k)*bernfrac(k)); a(n)=(-1)^n*b(2*n-1, 2)
CROSSREFS
KEYWORD
nonn
AUTHOR
Benoit Cloitre, Jul 03 2004
STATUS
approved