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A012991 arcsinh(arctan(x)+arcsin(x))=2*x-9/3!*x^3+361/5!*x^5-37247/7!*x^7... 0
2, -9, 361, -37247, 7669801, -2611958283, 1332778136517, -950743937966607, 903562629244729137, -1103376848629556507859, 1683455518560856213155933, -3138189120711848323676011959 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..11.

MATHEMATICA

With[{nn=30}, Take[CoefficientList[Series[ArcSinh[ArcTan[x]+ArcSin[x]], {x, 0, nn}], x] Range[0, nn-1]!, {2, -1, 2}]] (* Harvey P. Dale, Sep 02 2016 *)

CROSSREFS

Sequence in context: A302251 A013093 A013169 * A003818 A325619 A049299

Adjacent sequences:  A012988 A012989 A012990 * A012992 A012993 A012994

KEYWORD

sign

AUTHOR

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

STATUS

approved

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Last modified November 14 02:19 EST 2019. Contains 329108 sequences. (Running on oeis4.)