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A012955 tanh(tan(x)+arcsin(x))=2*x-13/3!*x^3+297/5!*x^5-14159/7!*x^7... 0
2, -13, 297, -14159, 1160001, -145101559, 25744031185, -6148333270639, 1901959189083393, -739758301216077031, 353356041582793698193, -203342136439150617071903, 138755544150262881446540993 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..12.

MATHEMATICA

With[{nn=30}, Take[CoefficientList[Series[Tanh[Tan[x]+ArcSin[x]], {x, 0, nn}], x] Range[0, nn-1]!, {2, -1, 2}]] (* Harvey P. Dale, Dec 09 2017 *)

CROSSREFS

Sequence in context: A123113 A126742 A013051 * A011808 A011841 A013106

Adjacent sequences:  A012952 A012953 A012954 * A012956 A012957 A012958

KEYWORD

sign

AUTHOR

Patrick Demichel (patrick.demichel(AT)hp.com)

STATUS

approved

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Last modified December 8 14:38 EST 2019. Contains 329865 sequences. (Running on oeis4.)