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A024336
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Expansion of e.g.f.: tan(log(1+x)^2)/2.
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0
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0, 0, 1, -3, 11, -50, 394, -4284, 51708, -653904, 8861256, -132180840, 2186984040, -39706739280, 779193951600, -16356660384960, 365503727198400, -8673545006246400, 218077259881872000, -5792698031011056000
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OFFSET
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0,4
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LINKS
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MATHEMATICA
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With[{nn=20}, CoefficientList[Series[Tan[Log[1+x]^2]/2, {x, 0, nn}], x]Range[0, nn]!] (* Harvey P. Dale, Sep 19 2012 *)
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CROSSREFS
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KEYWORD
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sign
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AUTHOR
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EXTENSIONS
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Extended with signs Mar 1997
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STATUS
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approved
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