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A013147 arcsinh(tanh(x)+arctan(x))=2*x-12/3!*x^3+488/5!*x^5-55552/7!*x^7... 0
2, -12, 488, -55552, 12546944, -4711567872, 2650074624000, -2084720933010432, 2185097305985613824, -2943182792681798926336, 4953485656236312191369216, -10186669183126638973192372224 (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[Tanh[x]+ArcTan[x]], {x, 0, nn}], x] Range[0, nn-1]!, {2, -1, 2}]] (* Harvey P. Dale, Jun 17 2015 *)

CROSSREFS

Sequence in context: A012625 A012630 A013173 * A250110 A266501 A264952

Adjacent sequences:  A013144 A013145 A013146 * A013148 A013149 A013150

KEYWORD

sign

AUTHOR

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

STATUS

approved

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Last modified September 22 18:56 EDT 2021. Contains 347608 sequences. (Running on oeis4.)