Numerator of [x^(2n)] of the Taylor series sec(cot(x)-coth(x))= 1 +2*x^2/9 +10*x^4/243 +2356*x^6/229635 +986*x^8/413343+...
A013557
Numerator of [x^(2n)] of the Taylor series sec(cot(x)-coth(x))= 1 +2*x^2/9 +10*x^4/243 +2356*x^6/229635 +986*x^8/413343+...
Terms
- a(0) =1a(1) =2a(2) =10a(3) =2356a(4) =986a(5) =36236852a(6) =45967324a(7) =6310668536a(8) =55999847998
External references
- oeis: A013557