Numerator of the coefficient [x^(2n+1)] of the Taylor series arctan(cosec(x) - coth(x)).

A013540

Numerator of the coefficient [x^(2n+1)] of the Taylor series arctan(cosec(x) - coth(x)).

Terms

    a(0) =-1a(1) =7a(2) =-17a(3) =913a(4) =-93959a(5) =9405719a(6) =-8909477a(7) =211410621413

External references