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Search: id:A027787
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| 91, 1470, 12600, 76160, 364140, 1465128, 5155080, 16279200, 47006190, 125847260, 315762216, 748843200, 1690097500, 3650610600, 7582037400, 15201516960, 29520803025, 55688330250, 102301525200, 183413260800
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OFFSET
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0,1
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FORMULA
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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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CROSSREFS
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Sequence in context: A036526 A020316 A120756 this_sequence A140667 A118706 A119150
Adjacent sequences: A027784 A027785 A027786 this_sequence A027788 A027789 A027790
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KEYWORD
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nonn
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AUTHOR
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thi ngoc dinh (via rkg(AT)cpsc.ucalgary.ca)
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