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A083012 a(n)=sum(k=0,n-1,8^k*B(k)*C(n,k)) where B(k) is the k-th Bernoulli number and C(n,k)=binomial(n,k). 0
0, 1, -7, 21, 49, -595, -1911, 39109, 165473, -4525731, -23883335, 805349237, 5097585297, -203564524787, -1503073984279, 69292329479205, 584713994953921, -30553447357629763, -290046835163027943, 16939595863125337813, 178676615255242261745 (list; graph; refs; listen; history; internal format)
OFFSET

1,3

PROG

(PARI) a(n)=sum(k=0, n-1, 8^k*binomial(n, k)*bernfrac(k))

CROSSREFS

Cf. A001469.

Sequence in context: A146637 A146701 A146613 * A070313 A146733 A146709

Adjacent sequences:  A083009 A083010 A083011 * A083013 A083014 A083015

KEYWORD

sign

AUTHOR

Benoit Cloitre (benoit7848c(AT)orange.fr), May 31 2003

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Last modified February 16 14:37 EST 2012. Contains 205930 sequences.