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A095363
a(n) = (-1)^n*b(2n-1,2) where b(n,p) = Sum_{k=0..n} p^k*C(2*k,k)*C(n+k,n-k)*B(k) and B(k) = k-th Bernoulli number.
0
1, 9, 225, 12593, 1273185, 203040057, 46870307393, 14772264119265, 6093038643430977, 3184951975892962025, 2057288080685705015841, 1609059940237527517292049, 1498486085527475212138686625
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
Cf. A006519.
Sequence in context: A001818 A360435 A369059 * A138564 A285985 A330830
KEYWORD
nonn
AUTHOR
Benoit Cloitre, Jul 03 2004
STATUS
approved