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A012827 sinh(sec(x)*arcsinh(x))=x+3/3!*x^3+45/5!*x^5+1071/7!*x^7+56697/9!*x^9... 0

%I

%S 1,3,45,1071,56697,3279419,376156261,35274762407,8003761282417,

%T 853554115621363,450081179390735645,17369944484313961631,

%U 62576187908645427074025,-11407841475969056406389973

%N sinh(sec(x)*arcsinh(x))=x+3/3!*x^3+45/5!*x^5+1071/7!*x^7+56697/9!*x^9...

%t With[{nn=30},Take[CoefficientList[Series[Sinh[Sec[x]ArcSinh[x]],{x,0,nn}],x] Range[0,nn-1]!,{2,-1,2}]] (* _Harvey P. Dale_, Mar 08 2018 *)

%K sign

%O 0,2

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

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Last modified July 6 15:57 EDT 2022. Contains 355111 sequences. (Running on oeis4.)