The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A012695 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A012695

arctan(tanh(x)*arcsinh(x))=2/2!*x^2-12/4!*x^4-50/6!*x^6+14280/8!*x^8...
(history; published version)

#6 by Harvey P. Dale at Tue Jun 07 17:12:23 EDT 2022

STATUS

editing

approved

#5 by Harvey P. Dale at Tue Jun 07 17:12:20 EDT 2022

MATHEMATICA

With[{nn=30}, Take[CoefficientList[Series[ArcTan[Tanh[x]ArcSinh[x]], {x, 0, nn}], x] Range[ 0, nn]!, {3, -1, 2}]] (* Harvey P. Dale, Jun 07 2022 *)

STATUS

approved

editing

#4 by Charles R Greathouse IV at Fri Feb 24 12:51:05 EST 2012

AUTHOR

Patrick Demichel (dmlpatrick.demichel(AT)hpfrcu03.france.hp.com)

Discussion

Fri Feb 24

12:51

OEIS Server: https://oeis.org/edit/global/108

#3 by N. J. A. Sloane at Fri May 16 03:00:00 EDT 2003

KEYWORD

sign,done,new

sign

AUTHOR

Patrick Demichel (dml@(AT)hpfrcu03.france.hp.com)

#2 by N. J. A. Sloane at Sun Jun 14 03:00:00 EDT 1998

REFERENCES

KEYWORD

sign,done,new

#1 by N. J. A. Sloane at Wed Dec 11 03:00:00 EST 1996

NAME

arctan(tanh(x)*arcsinh(x))=2/2!*x^2-12/4!*x^4-50/6!*x^6+14280/8!*x^8...

DATA

2, -12, -50, 14280, -826502, -49633540, 25407386758, -3395749736176, -840874377633678, 669385496489774468, -130679263245845309250, -109382532060795384014888, 114810087622932492884439786

OFFSET

0,1

REFERENCES

KEYWORD

sign,done

AUTHOR

Patrick Demichel (dml@hpfrcu03.france.hp.com)

STATUS

approved