OFFSET
0,3
LINKS
G. C. Greubel, Table of n, a(n) for n = 0..445
FORMULA
a(n) ~ n! * (-1)^(n+1) * tan(1). - Vaclav Kotesovec, Jan 24 2015
MAPLE
G(x):= tan(x)/(1+x): f[0]:=G(x): for n from 1 to 21 do f[n]:=diff(f[n-1], x) od: x:=0: seq(f[n], n=0..20); # Zerinvary Lajos, Apr 03 2009
MATHEMATICA
CoefficientList[Series[Tan[x]/(1 + x), {x, 0, 20}], x] * Range[0, 20]! (* Vaclav Kotesovec, Jan 24 2015 *)
PROG
(PARI) x='x+O('x^30); concat([0], Vec(serlaplace(tan(x)/(1+x)))) \\ G. C. Greubel, Feb 12 2018
CROSSREFS
KEYWORD
sign,easy
AUTHOR
EXTENSIONS
Extended with signs by Olivier Gérard, Mar 15 1997
STATUS
approved