A012335 - OEIS

A012335

tanh(arcsin(x)*sin(x))=2/2!*x^2-200/6!*x^6+1344/8!*x^8+367648/10!*x^10...

2, 0, -200, 1344, 367648, -7504640, -2587904384, 253284677632, 79392079655424, -6850403676839936, -2011786530842634240, 1982840495232732151808, 855419792148094652522496

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OFFSET

0,1

LINKS

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

MATHEMATICA

With[{nn=30}, Take[CoefficientList[Series[Tanh[ArcSin[x]Sin[x]], {x, 0, nn}], x] Range[0, nn]!, {3, -1, 2}]] (* Harvey P. Dale, Jan 14 2020 *)

CROSSREFS

Sequence in context: A012329 A064156 A269905 * A012331 A037096 A111814

Adjacent sequences: A012332 A012333 A012334 * A012336 A012337 A012338

KEYWORD

sign

AUTHOR

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

STATUS

approved