Numerators of expansion of arctanh(tan(x)) (odd powers only).

A335257

Numerators of expansion of arctanh(tan(x)) (odd powers only).

Terms

    a(0) =1a(1) =2a(2) =2a(3) =244a(4) =554a(5) =202084a(6) =166324a(7) =1594887848a(8) =456270874

External references