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Search: id:A027805
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| 126, 1470, 9240, 41580, 150150, 462462, 1261260, 3123120, 7147140, 15315300, 31039008, 59961720, 111105540, 198470580, 343219800, 576609264, 943854450, 1509157650, 2362159800, 3626122500, 5468192730
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OFFSET
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0,1
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FORMULA
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Number of 14-subsequences of [ 1, n ] with just 4 contiguous pairs; g.f. 42*(3+2x)/(1-x)^11
C(n+6, 6)*C(n+9, 4) - Zerinvary Lajos (zlaja(AT)freemail.hu), May 25 2005
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CROSSREFS
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Sequence in context: A104678 A154093 A002953 this_sequence A027814 A109146 A133499
Adjacent sequences: A027802 A027803 A027804 this_sequence A027806 A027807 A027808
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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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