A013109 arcsinh(arcsinh(x)+arctan(x))=2*x-11/3!*x^3+441/5!*x^5-48897/7!*x^7...

2, -11, 441, -48897, 10711449, -3898352493, 2124846180765, -1619764201737297, 1645104402411921297, -2147066174256624128277, 3501336873746919748187493, -6976563529004472877778185497

Offset: 0

Author

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

Keywords

• sign

Programs

Mathematica

With[{nn=30},Take[CoefficientList[Series[ArcSinh[ArcSinh[x]+ArcTan[x]],{x,0,nn}],x] Range[0,nn-1]!,{2,-1,2}]] (* Harvey P. Dale, Jul 19 2014 *)