OFFSET
1,1
LINKS
G. C. Greubel, Table of n, a(n) for n = 1..112
MATHEMATICA
Select[Denominator[CoefficientList[Series[1/Sin[x] - 1/Sinh[x], {x, 0, 50}], x]], # != 1 &] (* G. C. Greubel, Nov 11 2016 *)
CROSSREFS
KEYWORD
easy,frac,nonn
AUTHOR
Benoit Cloitre, Mar 29 2002
STATUS
approved