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Search: id:A027776
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| 16, 289, 2754, 18411, 96900, 427329, 1641486, 5638611, 17651304, 51074375, 138105110, 352023165, 851809140, 1968053535, 4362680250, 9316746045, 19234572480, 38504502630, 74934688620, 142097513250, 263083395960
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OFFSET
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0,1
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FORMULA
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Number of 18-subsequences of [ 1, n ] with just 1 contiguous pair; g.f. (16+x)/(1-x)^18
C(n+16, 16)*C(n+16, 1) - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jun 08 2005
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CROSSREFS
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Sequence in context: A158610 A004382 A038758 this_sequence A099279 A039746 A053856
Adjacent sequences: A027773 A027774 A027775 this_sequence A027777 A027778 A027779
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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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