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A013142 arcsin(tanh(x)+arctan(x))=2*x+4/3!*x^3+168/5!*x^5+13248/7!*x^7... 0
2, 4, 168, 13248, 2226048, 599902208, 243130652672, 137141067373568, 103018549675327488, 99335294756500832256, 119626550900969898049536, 175950984763936427137433600, 310396731889156481163306991616 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,1
LINKS
MATHEMATICA
With[{nn=30}, Take[CoefficientList[Series[ArcSin[Tanh[x]+ArcTan[x]], {x, 0, nn}], x] Range[0, nn-1]!, {2, -1, 2}]] (* Harvey P. Dale, Dec 16 2014 *)
CROSSREFS
Sequence in context: A132528 A018573 A018583 * A023171 A018595 A260900
KEYWORD
nonn
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved

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Last modified June 19 08:54 EDT 2024. Contains 373492 sequences. (Running on oeis4.)