OFFSET
0,2
LINKS
G. C. Greubel, Table of n, a(n) for n = 0..239
MATHEMATICA
With[{nn = 50}, CoefficientList[Series[Sinh[Tan[x]]/Cos[x], {x, 0, nn}], x]*Range[0, nn - 1]!][[2 ;; ;; 2]] (* G. C. Greubel, Jan 30 2018 *)
PROG
(PARI) x='x+O('x^40); v=Vec(serlaplace(sinh(tan(x))/cos(x))); vector((#v-1)\2 , n, v[2*n-1]) \\ G. C. Greubel, Jan 30 2018
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
Extended and signs tested by Olivier Gérard, Mar 15 1997
STATUS
approved