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A078487
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G.f.: (1-9*x+29*x^2-30*x^3+10*x^4-x^5-(1-6*x+x^2)^(1/2)*(1-6*x+13*x^2-7*x^3+x^4))/(2*x).
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1
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0, 1, 2, 6, 23, 100, 464, 2236, 11048, 55588, 283648, 1463868, 7626296, 40049188, 211768752, 1126513788, 6024316488, 32368294756, 174645900768, 945893037948, 5140619493464, 28024941448420, 153219244012432, 839884005112636, 4615012956649832, 25415266785076900
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OFFSET
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0,3
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COMMENTS
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Generating function for a certain wreath product.
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LINKS
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MATHEMATICA
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CoefficientList[Series[(1 - 9 x + 29 x^2 - 30 x^3 + 10 x^4 - x^5 - (1 - 6 x + x^2)^(1/2) (1 - 6 x + 13 x^2 - 7 x^3 + x^4))/(2 x), {x, 0, 33}], x] (* Vincenzo Librandi, May 28 2016 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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Replaced definition with g.f. given by Atkinson and Still (2002). - N. J. A. Sloane, May 24 2016
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STATUS
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approved
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