A012357 - OEIS

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

(list; graph; refs; listen; history; text; internal format)

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: A344747 A073633 A380950 * 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