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A034904
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Related to sept-factorial numbers A045754.
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2
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1, 28, 980, 37730, 1531838, 64337196, 2766499428, 121034349975, 5365856182225, 240390356963680, 10861273400995360, 494187939745288880, 22618601857572837200, 1040455685448350511200, 48069052667713793617440
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| Convolution of A034835(n-1) with A025752(n), n >= 1.
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LINKS
| Index entries for sequences related to factorial numbers
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FORMULA
| a(n) = 7^(n-1)*A045754(n)/n!, A045754(n)=(7*n-6)(!^7) := product(7*j-6, j=1..n); G.f. (-1+(1-49*x)^(-1/7))/7.
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MATHEMATICA
| CoefficientList[Series[(Power[1-49x, (-7)^-1]-1)/7, {x, 0, 30}], x] (* From Harvey P. Dale, Aug 23 2011 *)
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CROSSREFS
| Cf. A045754, A034835, A025752.
Sequence in context: A203135 A097579 A091549 * A189995 A162006 A025753
Adjacent sequences: A034901 A034902 A034903 * A034905 A034906 A034907
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KEYWORD
| easy,nonn
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AUTHOR
| Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de)
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