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A277510
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E.g.f.: -1/(1-LambertW(-x))^2.
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4
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-1, 2, -2, 6, 8, 170, 1872, 29246, 519808, 10698642, 248787200, 6458737142, 185138721792, 5808233422394, 197952647108608, 7283047491096750, 287705410381709312, 12145740050403520034, 545696709922799419392, 25998534614835587104742, 1309210567403228200960000
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OFFSET
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0,2
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LINKS
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FORMULA
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a(n) ~ n^(n-1) / 4.
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MATHEMATICA
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CoefficientList[Series[-1/(1-LambertW[-x])^2, {x, 0, 20}], x] * Range[0, 20]!
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PROG
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(PARI) x='x+O('x^50); Vec(serlaplace(-1/(1 - lambertw(-x))^2)) \\ G. C. Greubel, Nov 08 2017
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CROSSREFS
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KEYWORD
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sign
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AUTHOR
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STATUS
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approved
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