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A013109 arcsinh(arcsinh(x)+arctan(x))=2*x-11/3!*x^3+441/5!*x^5-48897/7!*x^7... 1
2, -11, 441, -48897, 10711449, -3898352493, 2124846180765, -1619764201737297, 1645104402411921297, -2147066174256624128277, 3501336873746919748187493, -6976563529004472877778185497 (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[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

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Last modified August 22 08:25 EDT 2019. Contains 326172 sequences. (Running on oeis4.)