Numerator of [x^(2n+1)] of the Taylor series arctan(cot(x)-coth(x))= -2*x/3 +8*x^3/81 -52*x^5/1701 +112*x^7/10935 -51412*x^9/13640319+...

A013555

Numerator of [x^(2n+1)] of the Taylor series arctan(cot(x)-coth(x))= -2*x/3 +8*x^3/81 -52*x^5/1701 +112*x^7/10935 -51412*x^9/13640319+...

Terms

    a(0) =-2a(1) =8a(2) =-52a(3) =112a(4) =-51412a(5) =3469712a(6) =-2491688a(7) =62534458528a(8) =-22811578796

External references