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Search: id:A081904
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| A081904 |
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A sequence related to C(n+6,6). |
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+0
2
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| 1, 9, 60, 344, 1794, 8754, 40636, 181380, 784251, 3302451, 13598280, 54922860, 218131380, 853586100, 3296508840, 12581531064, 47510175861, 177681098205, 658665849636, 2422018974096, 8840103322374, 32044237392726
(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 A055853. 2nd binomial transform of C(n+6,6). 3rd binomial transform of (1,6,15,20,15,6,1,0,0,0,.....)
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FORMULA
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a(n)=3^n(n^6+93n^5+3055n^4+44055n^3+282424n^2+720132n+524880)/524880 G.f.: (1-2x)^6/(1-3x)^7
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CROSSREFS
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Cf. A081905.
Adjacent sequences: A081901 A081902 A081903 this_sequence A081905 A081906 A081907
Sequence in context: A098327 A118674 A074431 this_sequence A085373 A082150 A026785
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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 31 2003
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