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A013382 arctan(sin(x)-tanh(x))=1/3!*x^3-15/5!*x^5+271/7!*x^7-8495/9!*x^9... 0
1, -15, 271, -8495, 492391, -47885175, 6512761711, -1126039513055, 241996705222231, -64384007995020135, 20971047413824897951, -8203471786087609654415, 3781059328242133245372871 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..12.

MATHEMATICA

With[{nn=40}, Take[CoefficientList[Series[ArcTan[Sin[x]-Tanh[x]], {x, 0, nn}], x] Range[ 0, nn-1]!, {4, -1, 2}]] (* Harvey P. Dale, May 08 2017 *)

CROSSREFS

Sequence in context: A013381 A013384 A013380 * A227973 A195615 A156091

Adjacent sequences:  A013379 A013380 A013381 * A013383 A013384 A013385

KEYWORD

sign

AUTHOR

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

STATUS

approved

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Last modified May 24 17:57 EDT 2022. Contains 354043 sequences. (Running on oeis4.)