A012919 tanh(arcsin(x)+sin(x))=2*x-16/3!*x^3+522/5!*x^5-36272/7!*x^7...

2, -16, 522, -36272, 4332306, -790580272, 204634311130, -71299016389072, 32177435417679138, -18258713934191944912, 12723759781734763643818, -10682188209509894403494768, 10634244661728432806888813618

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-1]!, {2, -1, 2}]] (* Harvey P. Dale, Apr 18 2026 *)

Crossrefs

Sequence in context: A013028 A136632 A168405 * A012914 A168404 A013087

Adjacent sequences: A012916 A012917 A012918 * A012920 A012921 A012922

Keyword

sign

Author

Patrick Demichel

Status

approved