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A027768
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(n+1)*C(n+1,8).
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0
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8, 81, 450, 1815, 5940, 16731, 42042, 96525, 205920, 413270, 787644, 1436058, 2519400, 4273290, 7034940, 11277222, 17651304, 27039375, 40619150, 59942025, 87026940, 124472205, 175587750, 244550475, 336585600
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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FORMULA
| Number of 10-subsequences of [ 1, n ] with just 1 contiguous pair; g.f. (8+x)/(1-x)^10
C(n+8, 8)*C(n+8, 1) - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jun 08 2005
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MAPLE
| a:=n->(sum((numbcomp(n, 9)), j=2..n)):seq(a(n), n=9..33); [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Aug 26 2008]
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CROSSREFS
| Sequence in context: A193943 A067449 A078292 * A007792 A098308 A055996
Adjacent sequences: A027765 A027766 A027767 * A027769 A027770 A027771
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KEYWORD
| nonn
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AUTHOR
| thi ngoc dinh (via rkg(AT)cpsc.ucalgary.ca)
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