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A012638 arctan(arcsinh(x)*cos(x))=x-6/3!*x^3+128/5!*x^5-7784/7!*x^7... 0
1, -6, 128, -7784, 863168, -153777536, 40156766336, -14452100967680, 6857570007949312, -4148412279035834368, 3116288727548544729088, -2846053921629037944078336, 3105570670613041972460814336 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

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

MATHEMATICA

With[{nn=30}, Take[CoefficientList[Series[ArcTan[ArcSinh[x]Cos[x]], {x, 0, nn}], x] Range[0, nn-1]!, {2, -1, 2}]] (* Harvey P. Dale, Apr 17 2015 *)

CROSSREFS

Sequence in context: A111873 A348796 A012842 * A338709 A318528 A095695

Adjacent sequences:  A012635 A012636 A012637 * A012639 A012640 A012641

KEYWORD

sign

AUTHOR

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

STATUS

approved

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Last modified November 29 12:24 EST 2021. Contains 349416 sequences. (Running on oeis4.)