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%I #6 Jan 09 2023 18:38:20
%S 1,2,32,1336,108800,14701312,2986596480,852635258112,325714440802304,
%T 160437668874481664,98998538588401238016,74780329820590921056256,
%U 67860526461080359727955968,72835853250644384064569933824
%N arcsinh(arcsin(arctanh(x)))=x+2/3!*x^3+32/5!*x^5+1336/7!*x^7...
%t With[{nn=30},Take[CoefficientList[Series[ArcSinh[ArcSin[ArcTanh[x]]],{x,0,nn}],x] Range[ 0,nn-1]!,{2,-1,2}]] (* _Harvey P. Dale_, Jan 09 2023 *)
%K nonn
%O 0,2
%A Patrick Demichel (patrick.demichel(AT)hp.com)
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