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Search: id:A145145
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| 1, 6, 35, 225, 2464, 29932, 375164, 4877100, 73016856, 1229669496, 22393143552, 430226343456, 8838633396384, 195021406776960, 4592633620285440, 114230969866103040, 2991995263667137536, 82505359191832358400
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OFFSET
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4,2
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MAPLE
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row:= proc(n) option remember; local f, i, x; f:= unapply (simplify (sum ('cat (a||i) *x^i', 'i'=0..n-1) ), x); unapply (subs (solve ({seq(f(i+1)= coeftayl (x/ (1-x-x^4)/ (1-x)^i, x=0, n), i=0..n-1)}, {seq (cat (a||i), i=0..n-1)}), sum ('cat (a||i) *x^i', 'i'=0..n-1) ), x); end: a:= n-> `if` (n=0, 0, coeftayl (row(n)(x), x=0, 3) *(n-1)!): seq (a(n), n=4..25);
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CROSSREFS
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Cf. A145153.
Sequence in context: A117671 A000399 A081051 this_sequence A087631 A167579 A030446
Adjacent sequences: A145142 A145143 A145144 this_sequence A145146 A145147 A145148
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KEYWORD
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nonn
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AUTHOR
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Alois P. Heinz (heinz(AT)hs-heilbronn.de), Oct 03 2008
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