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Search: id:A027768
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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
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OFFSET
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0,1
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FORMULA
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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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CROSSREFS
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Sequence in context: A002072 A067449 A078292 this_sequence A007792 A098308 A055996
Adjacent sequences: A027765 A027766 A027767 this_sequence A027769 A027770 A027771
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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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