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A076574
a(0)=1 if n>0 a(n)=(-1)^(n+1)/(2n+1)*sum(k=0,n,4^(6k)*B(2k)*C(2n+1,2k)) where B(k) denotes the k-th Bernoulli number.
0
1, 683, 557875, 1633383863, 9367236055495, 87201869442139043, 1193374352393955942715, 22530375500983985686992623, 560996326873703660609079627535, 17810524140784329468678138258776603
OFFSET
0,2
PROG
(PARI) a(n)=sum(i=0, n, 4^(6*i)*bernfrac(2*i)*binomial(2*n+1, 2*i))
CROSSREFS
Sequence in context: A065123 A269486 A239272 * A344202 A015386 A245393
KEYWORD
nonn
AUTHOR
Benoit Cloitre, Oct 19 2002
STATUS
approved