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Search: id:A081895
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| A081895 |
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A sequence related to C(n+3,3). |
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+0
3
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| 1, 6, 30, 136, 579, 2358, 9288, 35640, 133893, 494262, 1797714, 6456024, 22930695, 80660934, 281309436, 973599912, 3346483977, 11431295910, 38828142342, 131206405608, 441271936971, 1477621745046, 4927988620080, 16373939547096
(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 A049612 2nd binomial transform of C(n+3,3), A000292 3rd binomial transform of (1,3,3,1,0,0,0,0,....)
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FORMULA
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a(n)=3^n(n^3+24n^2+137n+162)/162 G.f.: (1-2x)^3/(1-3x)^4
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CROSSREFS
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Cf. A081896.
Sequence in context: A007465 A073389 A036068 this_sequence A030280 A034545 A002920
Adjacent sequences: A081892 A081893 A081894 this_sequence A081896 A081897 A081898
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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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