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A012834
arcsin(sec(x)*tanh(x))=x+2/3!*x^3+40/5!*x^5+1192/7!*x^7+87680/9!*x^9...
0
1, 2, 40, 1192, 87680, 9890432, 1736725120, 424537276672, 139089326735360, 58613115790118912, 30905365440751206400, 19924657840958605361152, 15419390055940961625866240, 14105236549373087746555707392
OFFSET
0,2
MATHEMATICA
nn=27; Select[CoefficientList[Series[ArcSin[Sec[x]Tanh[x]], {x, 0, nn}], x]Range[0, nn]!, #!=0&] (* Harvey P. Dale, Jul 26 2011 *)
CROSSREFS
Sequence in context: A012637 A127429 A322179 * A304448 A012241 A341589
KEYWORD
nonn
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved