A012382 tanh(tan(x)*arcsin(x))=2/2!*x^2+12/4!*x^4-50/6!*x^6-14280/8!*x^8...

2, 12, -50, -14280, -1068422, -30200060, 10958392198, 3463555073776, 545166839566962, -49116089574216068, -83255760459250654530, -37791627619282937372632, -5498203465858654403105814

Offset

0,1

Links

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

Mathematica

With[{nn=30}, Take[CoefficientList[Series[Tanh[Tan[x]ArcSin[x]], {x, 0, nn}], x] Range[ 0, nn]!, {3, -1, 2}]] (* Harvey P. Dale, Nov 26 2022 *)

Crossrefs

Sequence in context: A012423 A012427 A012695 * A198008 A359523 A323851

Adjacent sequences: A012379 A012380 A012381 * A012383 A012384 A012385

Keyword

sign

Author

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

Status

approved