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A027771 (n+1)*C(n+1,11). 1
11, 144, 1014, 5096, 20475, 69888, 210392, 572832, 1436058, 3359200, 7407036, 15519504, 31097794, 59907456, 111435000, 200880160, 352023165, 601277040, 1003321410, 1638819000, 2624841765, 4128783360, 6386711760, 9727323840, 14602906500, 21628990656 (list; graph; refs; listen; history; text; internal format)
OFFSET

10,1

LINKS

T. D. Noe, Table of n, a(n) for n = 10..1000

FORMULA

Number of 13-subsequences of [ 1, n ] with just 1 contiguous pair; g.f. (11+x)/(1-x)^13

C(n+11, 11)*C(n+11, 1) - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jun 08 2005

CROSSREFS

Sequence in context: A214098 A015687 A051583 * A098310 A061613 A093750

Adjacent sequences:  A027768 A027769 A027770 * A027772 A027773 A027774

KEYWORD

nonn

AUTHOR

thi ngoc dinh (via rkg(AT)cpsc.ucalgary.ca)

STATUS

approved

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Last modified May 19 12:42 EDT 2013. Contains 225429 sequences.