OFFSET
0,2
COMMENTS
The numerators are apparently the same as A047691.
FORMULA
a(n) = A047692(n) * 2^n. - Sean A. Irvine, Aug 07 2018
EXAMPLE
exp(cosec(x)-cot(x)) = 1 +1*x/(2^1*1!) + 1*x^2/(2^2*2!) + 3*x^3/(2^3*3!) + 9*x^4/(2^4*4!) + 37*x^5/(2^5*5!) + 177*x^6/(2^6*6!) +959*x^7/(2^7*7!)+ ...
MAPLE
A013516 := proc(n)
exp(csc(x)-cot(x)) ;
coeftayl( %, x=0, n) ;
denom(%) ;
end proc: # R. J. Mathar, Dec 18 2011
CROSSREFS
KEYWORD
nonn,frac
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
EXTENSIONS
Corrected by R. J. Mathar, Dec 18 2011
STATUS
approved