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Search: id:A111110
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| A111110 |
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G.f.: x*(x^4-x^3+4*x^2-3*x+1)/(1-5*x+9*x^2-8*x^3+2*x^4-x^5). |
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+0
1
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| 0, 1, 2, 5, 14, 40, 111, 299, 793, 2096, 5553, 14758, 39294, 104673, 278773, 742197, 1975582, 5258269, 13995810, 37253664, 99163215, 263958623, 702620141, 1870267300, 4978351449, 13251558642, 35273486910, 93892303905, 249926170873, 665263248665, 1770823721530
(list; graph; listen)
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OFFSET
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0,3
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REFERENCES
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M. H. Albert and M. D. Atkinson, Simple permutations and pattern restricted permutations, Discr. Math., 300 (2005), 1-15.
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MATHEMATICA
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CoefficientList[ Series[x*(x^4 - x^3 + 4x^2 - 3x + 1)/(1 - 5x + 9x^2 - 8x^3 + 2x^4 - x^5), {x, 0, 30}], x] (from Robert G. Wilson v (rgwv(at)rgwv.com), Oct 15 2005)
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CROSSREFS
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Sequence in context: A102406 A003054 A126219 this_sequence A111109 A081908 A059505
Adjacent sequences: A111107 A111108 A111109 this_sequence A111111 A111112 A111113
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KEYWORD
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nonn
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AUTHOR
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njas, Oct 14 2005
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