Numerator of [x^(2n+1)] of the Taylor series sin(cot(x)-coth(x)).

A013552

Numerator of [x^(2n+1)] of the Taylor series sin(cot(x)-coth(x)).

Terms

    a(0) =-2a(1) =4a(2) =-136a(3) =656a(4) =-47672a(5) =3091664a(6) =-16788784a(7) =15764283616

External references