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Search: id:A147625
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| A147625 |
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Octo-factorial numbers(4). |
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+0
4
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| 1, 5, 65, 1365, 39585, 1464645, 65909025, 3493178325, 213083877825, 14702787569925, 1132114642884225, 96229744645159125, 8949366251999798625, 903885991451979661125, 98523573068265783062625
(list; graph; listen)
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OFFSET
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1,2
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FORMULA
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a(n+1)=Sum_{k, 0<=k<=n}A132393(n,k)*5^k*8^(n-k). [From Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Nov 09 2008]
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MATHEMATICA
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s=1; lst={s}; Do[s+=n*s; AppendTo[lst, s], {n, 4, 2*5!, 8}]; lst
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CROSSREFS
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Sequence in context: A121822 A056245 A079482 this_sequence A157097 A046881 A012635
Adjacent sequences: A147622 A147623 A147624 this_sequence A147626 A147627 A147628
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KEYWORD
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nonn
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AUTHOR
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Vladimir Orlovsky (4vladimir(AT)gmail.com), Nov 08 2008
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