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

0,1

Links

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

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 *)

Crossrefs

Sequence in context: A013046 A012950 A012979 * A120934 A000886 A128855

Adjacent sequences: A013106 A013107 A013108 * A013110 A013111 A013112

Keyword

sign

Author

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

Status

approved