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Search: id:A081897
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| A081897 |
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A sequence related to C(n+3,3). |
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+0
2
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| 1, 8, 58, 396, 2595, 16500, 102500, 625000, 3753125, 22250000, 130468750, 757812500, 4365234375, 24960937500, 141796875000, 800781250000, 4498291015625, 25146484375000, 139953613281250, 775756835937500
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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Binomial transform of A081895. 4th binomial transform of C(n+3,3), A000292 5th binomial transform of (1,3,3,1,0,0,0,0,....)
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FORMULA
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a(n)=5^n(n^3+42n^2+407n+750)/750 G.f.: (1-4x)^3/(1-5x)^4
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CROSSREFS
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Adjacent sequences: A081894 A081895 A081896 this_sequence A081898 A081899 A081900
Sequence in context: A026948 A111585 A055839 this_sequence A125371 A037532 A062236
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KEYWORD
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easy,nonn
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AUTHOR
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Paul Barry (pbarry(AT)wit.ie), Mar 30 2003
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