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A013510
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arcsinh(sec(x)-sech(x))=2/2!*x^2+2/6!*x^6+65762/10!*x^10...
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0
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2, 2, 65762, -418934878, 14989881142082, -1159565898643479358, 201365713271464069504802, -65359378924390295271709921438, 36977332162396361445823162953505922, -33930775864190349375460255092763386069118, 47994298632572575541623806754970220542333977442
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refs;
listen;
history;
text;
internal format)
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OFFSET
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0,1
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LINKS
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MATHEMATICA
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With[{nn=50}, Take[CoefficientList[Series[ArcSinh[Sec[x]-Sech[x]], {x, 0, nn}], x]Range[0, nn]!, {3, -1, 4}]] (* Harvey P. Dale, Jan 22 2013 *)
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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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