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A027787
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7*(n+1)*C(n+2,14).
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0
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91, 1470, 12600, 76160, 364140, 1465128, 5155080, 16279200, 47006190, 125847260, 315762216, 748843200, 1690097500, 3650610600, 7582037400, 15201516960, 29520803025, 55688330250, 102301525200, 183413260800
(list; graph; refs; listen; history; internal format)
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OFFSET
| 12,1
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FORMULA
| Number of 17-subsequences of [ 1, n ] with just 2 contiguous pairs; g.f. 7*(13+2x)/(1-x)^16
C(n+13, 13)*C(n+14, 2) - Zerinvary Lajos (zlaja(AT)freemail.hu), May 10 2005
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MATHEMATICA
| Table[7(n+1)Binomial[n+2, 14], {n, 12, 40}] (* From Harvey P. Dale, Jul 18 2011 *)
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CROSSREFS
| Sequence in context: A020316 A195221 A120756 * A140667 A184462 A118706
Adjacent sequences: A027784 A027785 A027786 * A027788 A027789 A027790
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KEYWORD
| nonn
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AUTHOR
| thi ngoc dinh (via rkg(AT)cpsc.ucalgary.ca)
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EXTENSIONS
| Corrected offset [from Harvey P. Dale, Jul 18 2011]
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