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Search: id:A085372
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| A085372 |
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If n = 0 or 1 then a(n) = 1; if n = 2, 3 or 4 then a(n) = 0; otherwise a(n) = (n+1)*a(n-1)-(n-2)*a(n-2)-(n-5)*a(n-3)+(n-3)*a(n-4). |
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+0
1
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| 1, 1, 0, 0, 0, 2, 14, 102, 828, 7522, 75706, 836622, 10073824, 131300266, 1841921270, 27673138086, 443343106468, 7544813993618, 135925854199186, 2584491212811038, 51722014716352136, 1086739983701035418
(list; graph; listen)
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OFFSET
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0,6
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COMMENT
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This is the same recurrence as A002464 but with different initial values.
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MAPLE
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A085372 := proc(n) options remember; if n <= 1 then 1 elif n <= 4 then 0 else (n+1)*A085372(n-1)-(n-2)*A085372(n-2)-(n-5)*A085372(n-3)+(n-3)*A085372(n-4); fi; end;
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CROSSREFS
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Cf. A002464.
Sequence in context: A144277 A037726 A037621 this_sequence A123525 A122680 A121122
Adjacent sequences: A085369 A085370 A085371 this_sequence A085373 A085374 A085375
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KEYWORD
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nonn,easy
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AUTHOR
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njas, Aug 14 2003
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