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Search: id:A069991
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| A069991 |
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(-1)^(n+1)/14*sum(k=1,2n,C(2n+1,k)*B(k)*7^k) where C(n,k) are the binomial coefficients, B(k) the Bernoulli numbers. |
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+0
1
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| 1, 24, 1211, 107426, 14639841, 2833334908, 738420667591, 249285306765270, 105817142655593261, 55162112425933979312, 34643962156837119237651, 25799726424152610741805834, 22479598186937674926509533561
(list; graph; listen)
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OFFSET
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1,2
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PROGRAM
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(PARI) for(n=1, 25, print1(-(-1)^n*sum(i=1, 2*n, binomial(2*n+1, i)*bernfrac(i)*7^i)/14, ", "))
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CROSSREFS
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Sequence in context: A090675 A042107 A042104 this_sequence A035025 A074652 A068294
Adjacent sequences: A069988 A069989 A069990 this_sequence A069992 A069993 A069994
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KEYWORD
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easy,nonn
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AUTHOR
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Benoit Cloitre (benoit7848c(AT)orange.fr), May 01 2002
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