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Search: id:A049211
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| A049211 |
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- Product(9*k-1,k=0..n); 9-factorial numbers. |
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+0
8
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| 1, 8, 136, 3536, 123760, 5445440, 288608320, 17893715840, 1270453824640, 1011636305971200, 9045631231436800, 886471860680806400, 94852489092846284800, 11002888734770169036800
(list; graph; listen)
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OFFSET
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0,2
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FORMULA
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a(n)= 8*A035022(n) = (9*n-1)(!^9), n >= 1, a(0) := 1.
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MATHEMATICA
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s=1; lst={s}; Do[s+=n*s; AppendTo[lst, s], {n, 7, 2*5!, 9}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Nov 08 2008]
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CROSSREFS
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Cf. A008543, A049210, A049212.
Sequence in context: A131927 A132869 A036915 this_sequence A024283 A134053 A136472
Adjacent sequences: A049208 A049209 A049210 this_sequence A049212 A049213 A049214
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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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