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Search: id:A027799
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| 364, 5915, 50960, 309400, 1485120, 5996172, 21162960, 67016040, 193993800, 520550030, 1308811504, 3109779400, 7030805600, 15210877500, 31638625200, 63520624440, 123512325300, 233272227825, 429006396000
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OFFSET
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0,1
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FORMULA
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Number of 18-subsequences of [ 1, n ] with just 3 contiguous pairs; g.f. 91*(4+x)/(1-x)^16
C(n+12, 12)*C(n+14, 3) - Zerinvary Lajos (zlaja(AT)freemail.hu), May 10 2005
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CROSSREFS
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Adjacent sequences: A027796 A027797 A027798 this_sequence A027800 A027801 A027802
Sequence in context: A131348 A043471 A105920 this_sequence A115191 A022045 A107509
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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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