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Search: id:A081898
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| A081898 |
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A sequence related to C(n+4,4). |
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+0
2
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| 1, 7, 39, 193, 886, 3858, 16146, 65502, 259119, 1003833, 3820689, 14322663, 52986636, 193759452, 701265924, 2514778812, 8943620589, 31569189723, 110673119691, 385569479997, 1335567565746, 4601780568342, 15778086835014
(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 A055589 (without leading 0). 2nd binomial transform of C(n+4,4), A000332. 3rd binomial transform of (1,4,6,4,1,0,0,0,.....)
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FORMULA
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a(n)=3^n(n^4+42n^3+515n^2+2034n+1944)/1944 G.f.(1-2x)^4/(1-3x)^5
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CROSSREFS
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Cf. A081899.
Sequence in context: A128554 A032207 A004057 this_sequence A034267 A026752 A026379
Adjacent sequences: A081895 A081896 A081897 this_sequence A081899 A081900 A081901
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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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