A012705 arctanh(arctanh(x)*log(x+1))=2/2!*x^2-3/3!*x^3+16/4!*x^4-50/5!*x^5...

0, 0, 2, -3, 16, -50, 608, -4284, 53856, -517824, 7607232, -100164240, 1728315840, -28348912800, 556461697920, -10888103691360, 242440897198080, -5503830139207680, 137385752450058240, -3536219373095508480

Offset

0,3

Links

Table of n, a(n) for n=0..19.

Mathematica

With[{nn=30}, CoefficientList[Series[ArcTanh[ArcTanh[x]*Log[x+1]], {x, 0, nn}], x] Range[0, nn]!] (* Ray Chandler, Nov 28 2016 *)

Crossrefs

Sequence in context: A012354 A012358 A012700 * A103331 A052506 A355229

Adjacent sequences: A012702 A012703 A012704 * A012706 A012707 A012708

Keyword

sign

Author

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

Status

approved