A076573 a(0)=1 if n>0 a(n)=(-1)^(n+1)/(2n+1)*sum(k=0,n,4^(5k)*B(2k)*C(2n+1,2k)) where B(k) denotes the k-th Bernoulli number.

1, 171, 34611, 25391031, 36412266951, 84746764368291, 289947183663000891, 1368522076163485223151, 8518903397471846192668431, 67614595884596632809835843611, 666443065911076418265517497701571

Offset

0,2

Links

Table of n, a(n) for n=0..10.

Crossrefs

Sequence in context: A262113 A145625 A097844 * A015356 A259158 A252139

Adjacent sequences: A076570 A076571 A076572 * A076574 A076575 A076576

Keyword

nonn

Author

Benoit Cloitre, Oct 19 2002

Status

approved