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A027773
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(n+1)*C(n+1,13).
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0
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13, 196, 1575, 8960, 40460, 154224, 515508, 1550400, 4273290, 10943240, 26313518, 59907456, 130007500, 270415600, 541574100, 1048380480, 1968053535, 3592795500, 6393845325, 11115955200, 18914492520
(list; graph; refs; listen; history; internal format)
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OFFSET
| 12,1
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FORMULA
| Number of 15-subsequences of [ 1, n ] with just 1 contiguous pair; g.f. (13+x)/(1-x)^15
a(n) = C(n+13, 13)*C(n+13, 1) - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jun 08 2005
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MATHEMATICA
| (#+1)Binomial[#+1, 13]&/@Range[12, 40] (* From Harvey P. Dale, Mar 18 2011 *)
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CROSSREFS
| Sequence in context: A159196 A177508 A015690 * A099271 A081796 A140536
Adjacent sequences: A027770 A027771 A027772 * A027774 A027775 A027776
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KEYWORD
| nonn
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AUTHOR
| thi ngoc dinh (via rkg(AT)cpsc.ucalgary.ca)
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