Numerator of [x^(2n)] in the Taylor expansion log(cot(x)*arctanh(x)).

A012871

Numerator of [x^(2n)] in the Taylor expansion log(cot(x)*arctanh(x)).

Terms

    a(0) =1a(1) =1a(2) =317a(3) =389a(4) =6895597a(5) =8704831a(6) =10655226077a(7) =1657771289

External references