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Search: id:A027792
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| 35, 336, 1764, 6720, 20790, 55440, 132132, 288288, 585585, 1121120, 2042040, 3564288, 5996172, 9767520, 15465240, 23876160, 36038079, 53300016, 77392700, 110510400, 155405250, 215495280, 294987420, 399016800, 533803725
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OFFSET
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0,1
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FORMULA
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Number of 11-subsequences of [ 1, n ] with just 3 contiguous pairs; g.f. 7*(5+3x)/(1-x)^9
C(n+5, 5)*C(n+7, 3) - Zerinvary Lajos (zlaja(AT)freemail.hu), May 10 2005
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CROSSREFS
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Sequence in context: A055658 A125773 A071697 this_sequence A101099 A027803 A073567
Adjacent sequences: A027789 A027790 A027791 this_sequence A027793 A027794 A027795
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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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