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Search: id:A027786
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| 78, 1183, 9555, 54600, 247520, 946764, 3174444, 9573720, 26453700, 67897830, 163601438, 373173528, 811246800, 1690097500, 3389852700, 6571099080, 12351232530, 22574731725, 40219349625, 69995780400, 119218619520
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OFFSET
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0,1
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FORMULA
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Number of 16-subsequences of [ 1, n ] with just 2 contiguous pairs; g.f. 13*(6+x)/(1-x)^15
C(n+12, n)*C(n+13, 2) - Zerinvary Lajos (zlaja(AT)freemail.hu), Apr 28 2005
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CROSSREFS
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Sequence in context: A119093 A128951 A114532 this_sequence A036524 A140934 A133239
Adjacent sequences: A027783 A027784 A027785 this_sequence A027787 A027788 A027789
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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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