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A013198
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E.g.f.: log(sec(x)+arcsinh(x)) = x-2/3!*x^3+12/4!*x^4-32/5!*x^5+72/6!*x^6...
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0
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0, 1, 0, -2, 12, -32, 72, 152, -3808, 48448, -333440, 289408, 26461952, -393649024, 4126861312, -34249082624, -93963415552, 12871254335488, -272828216803328, 2591959365570560, 6130847346393088
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listen;
history;
text;
internal format)
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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}, Rest[CoefficientList[Series[Log[Sec[x]+ArcSinh[x]], {x, 0, nn}], x]Range[0, nn]!]] (* Harvey P. Dale, Jun 27 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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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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