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Search: id:A081905
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| A081905 |
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A sequence related to C(n+6,6). |
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+0
3
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| 1, 10, 79, 552, 3567, 21810, 127905, 725820, 4009920, 21664000, 114840064, 598865920, 3078537216, 15626600448, 78431059968, 389685706752, 1918516592640, 9367021682688, 45387134009344, 218388081147904
(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 A081904. 3rd binomial transform of C(n+6,6). 4th binomial transform of (1,6,15,20,15,6,1,0,0,0,.....).
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FORMULA
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a(n)=4^n(n^6+129n^5+5845n^4+115215n^3+993874n^2+3308616n+2949120)/2949120 G.f.(1-3x)^6/(1-4x)^7
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CROSSREFS
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Cf. A081906.
Sequence in context: A153596 A056986 A006469 this_sequence A016138 A006329 A077245
Adjacent sequences: A081902 A081903 A081904 this_sequence A081906 A081907 A081908
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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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