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A147631
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9-factorial numbers (6).
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0
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1, 7, 112, 2800, 95200, 4093600, 212867200, 12984899200, 908942944000, 71806492576000, 6318971346688000, 612940220628736000, 64971663386646016000, 7471741289464291840000, 926495919893572188160000
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OFFSET
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1,2
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LINKS
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Table of n, a(n) for n=1..15.
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FORMULA
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a(n+1) = Sum_{k=0..n} A132393(n,k)*7^k*9^(n-k). - Philippe Deléham, Nov 09 2008
a(n) = (-2)^n*Sum_{k=0..n} (9/2)^k*s(n+1,n+1-k), where s(n,k) are the Stirling numbers of the first kind, A048994. - Mircea Merca, May 03 2012
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MATHEMATICA
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s=1; lst={s}; Do[s+=n*s; AppendTo[lst, s], {n, 6, 2*5!, 9}]; lst
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CROSSREFS
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Cf. A147630, A147629, A049211, A051232, A045756, A035012, A035013, A035017, A035018, A035020, A035022, A035023, A053116.
Cf. A048994, A132393.
Sequence in context: A067404 A129030 A128576 * A010795 A293456 A099153
Adjacent sequences: A147628 A147629 A147630 * A147632 A147633 A147634
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KEYWORD
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nonn
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AUTHOR
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Vladimir Joseph Stephan Orlovsky, Nov 08 2008
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STATUS
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approved
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