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Search: id:A034975
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| A034975 |
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One seventh of octo-factorial numbers. |
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+0
6
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| 1, 15, 345, 10695, 417105, 19603935, 1078216425, 67927634775, 4822862069025, 381006103452975, 33147531000408825, 3149015445038838375, 324348590839000352625, 36002693583129039141375
(list; graph; listen)
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OFFSET
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1,2
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LINKS
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Index entries for sequences related to factorial numbers
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FORMULA
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7*a(n) = (8*n-1)!^8 := product(8*j-1, j=1..n) = (8n)!/((2*n)!*2^(6*n)*3^2*5*A045755(n)*A007696(n)*A034909(n)*A034911(n)*A034176(n)); E.g.f. (-1+(1-8*x)^(-7/8))/7.
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MATHEMATICA
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s=1; lst={s}; Do[s+=n*s; AppendTo[lst, s], {n, 14, 5!, 8}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Nov 08 2008]
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CROSSREFS
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Cf. A045755, A034908-A034912, A034976.
Sequence in context: A114937 A157965 A100875 this_sequence A012787 A030049 A012486
Adjacent sequences: A034972 A034973 A034974 this_sequence A034976 A034977 A034978
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KEYWORD
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easy,nonn
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AUTHOR
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Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de)
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