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A013531
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Numerator of [x^(2n+1)] in the Taylor expansion arcsin(cosec(x) - cosech(x)) = x/3 + x^3/162 + 5*x^5/1134 + 19*x^7/76545 + 13793*x^9/218245104 + ...
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1
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1, 1, 5, 19, 13793, 7487, 235549, 4400752781, 1455564577, 75143281206379, 17910727755514921, 208450205999558953, 8864292850179951461, 36884532202496983982602507
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OFFSET
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0,3
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LINKS
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MATHEMATICA
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Select[Numerator[CoefficientList[Series[ArcSin[1/Sin[x] - 1/Sinh[x]], {x, 0, 52}], x]], # != 0 &] (* G. C. Greubel, Nov 11 2016 *)
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CROSSREFS
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KEYWORD
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nonn,frac
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AUTHOR
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Patrick Demichel (patrick.demichel(AT)hp.com)
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EXTENSIONS
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STATUS
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approved
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