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A088369
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G.f.: 1/(1-x-x^2)^x.
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0
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1, 0, 2, 9, 44, 390, 3474, 37800, 471344, 6602904, 103271400, 1779944760, 33542915592, 686101244400, 15139184749584, 358465510133640, 9066087526045440, 243928110816129600, 6956913949298380224
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OFFSET
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0,3
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LINKS
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Table of n, a(n) for n=0..18.
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MATHEMATICA
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With[{nn=30}, CoefficientList[Series[1/(1-x-x^2)^x, {x, 0, nn}], x]Range[ 0, nn]!] (* From Harvey P. Dale, May 06 2012 *)
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CROSSREFS
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Sequence in context: A196301 A184932 A073478 * A059388 A059392 A074607
Adjacent sequences: A088366 A088367 A088368 * A088370 A088371 A088372
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KEYWORD
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nonn
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AUTHOR
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Paul D. Hanna, Sep 28 2003
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STATUS
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approved
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