A013452 sin(tan(x)-tanh(x))=4/3!*x^3+544/7!*x^7-17920/9!*x^9+707584/11!*x^11...

4, 0, 544, -17920, 707584, -149360640, 5242548224, -2782416732160, 166243180478464, -109528131284500480, 13239205658628194304, -8328889253838297497600, 1938205426199431158431744

Offset

0,1

Links

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

Mathematica

With[{nn=30}, Take[CoefficientList[Series[Sin[Tan[x]-Tanh[x]], {x, 0, nn}], x] Range[0, nn-1]!, {4, -1, 2}]] (* Harvey P. Dale, Jul 21 2015 *)

Crossrefs

Sequence in context: A255018 A176050 A099841 * A013453 A012688 A216675

Adjacent sequences: A013449 A013450 A013451 * A013453 A013454 A013455

Keyword

sign

Author

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

Status

approved