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A013473 arctan(cos(x)-cosh(x))=238/6!*x^6-715682/10!*x^10+12212600398/14!*x^14... 0
-2, 238, -715682, 12212600398, -693692750003522, 99086243037690160558, -29914788669101073817179362, 16957033980662331163451765544718, -16560275867709925788740349268459459202, 26102948307736145181548875145546574191456878 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..9.

MATHEMATICA

With[{nn=40}, Take[CoefficientList[Series[ArcTan[Cos[x]-Cosh[x]], {x, 0, nn}], x] Range[0, nn-2]!, {3, -1, 4}]] (* Harvey P. Dale, Apr 08 2016 *)

CROSSREFS

Sequence in context: A101146 A159280 A013477 * A212839 A225784 A087226

Adjacent sequences:  A013470 A013471 A013472 * A013474 A013475 A013476

KEYWORD

sign

AUTHOR

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

EXTENSIONS

Corrected and extended by Harvey P. Dale, Apr 08 2016

STATUS

approved

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Last modified July 14 18:26 EDT 2020. Contains 335729 sequences. (Running on oeis4.)