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A083011 a(n)=sum(k=0,n-1,7^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, -6, 15, 36, -335, -1098, 16955, 73032, -1503963, -8075430, 204957775, 1319806188, -39666688711, -297958666242, 10337889346275, 88743928066704, -3489994294713779, -33703905982634334, 1481439997178305655, 15896303102840841780, -772269573963075710367 (list; graph; refs; listen; history; internal format)
OFFSET

1,3

PROG

(PARI) a(n)=sum(k=0, n-1, 7^k*binomial(n, k)*bernfrac(k))

CROSSREFS

Cf. A001469.

Sequence in context: A177206 A128443 A135854 * A192308 A171159 A114696

Adjacent sequences:  A083008 A083009 A083010 * A083012 A083013 A083014

KEYWORD

sign

AUTHOR

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

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Last modified February 15 23:53 EST 2012. Contains 205860 sequences.