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Search: id:A027814
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| 126, 1512, 9702, 44352, 162162, 504504, 1387386, 3459456, 7963956, 17153136, 34918884, 67721472, 125919612, 225629712, 391270572, 658982016, 1081142370, 1732250520, 2716483770, 4177293120, 6309453150
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OFFSET
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0,1
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FORMULA
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Number of 15-subsequences of [ 1, n ] with just 5 contiguous pairs; g.f. 126*(1+x)/(1-x)^11
C(n+5, 5)*C(n+9, 5). - Zerinvary Lajos (zlaja(AT)freemail.hu), Apr 18 2005
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CROSSREFS
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Sequence in context: A104678 A002953 A027805 this_sequence A109146 A133499 A113857
Adjacent sequences: A027811 A027812 A027813 this_sequence A027815 A027816 A027817
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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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