A012357 Expansion of e.g.f. tanh(tan(x) * log(x+1)).

0, 0, 2, -3, 16, -50, 80, 924, -24544, 320832, -4041152, 44762960, -443911360, 3134031264, 10007901696, -1090110964320, 32403860361216, -748994799421952, 15182814672728064, -270877746698076672, 3931180447615393792, -28568579846042019840, -934246098808782868480

Offset

0,3

Links

Table of n, a(n) for n=0..22.

Example

2/2!*x^2 - 3/3!*x^3 + 16/4!*x^4 - 50/5!*x^5 ...

Crossrefs

Sequence in context: A072684 A344747 A073633 * A012701 A012356 A012352

Adjacent sequences: A012354 A012355 A012356 * A012358 A012359 A012360

Keyword

sign

Author

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

Extensions

a(0) and a(1) inserted and title improved by Sean A. Irvine, Jul 18 2018

Status

approved