Numerator of [x^n] in the Taylor expansion exp(cot(x)-coth(x))= 1-2*x/3 +2x^2/9 -4*x^3/81 +2*x^4/243 -136*x^5/25515 +676*x^6/229635 -...
A013551
Numerator of [x^n] in the Taylor expansion exp(cot(x)-coth(x))= 1-2*x/3 +2x^2/9 -4*x^3/81 +2*x^4/243 -136*x^5/25515 +676*x^6/229635 -...
Terms
- a(0) =1a(1) =-2a(2) =2a(3) =-4a(4) =2a(5) =-136a(6) =676a(7) =-656a(8) =62a(9) =-47672a(10) =2714132a(11) =-3091664a(12) =7223932a(13) =-16788784a(14) =120994136a(15) =-15764283616a(16) =13831453742
External references
- oeis: A013551