E.g.f.: log(1+tanh(x)*tan(x))/2 (even powers only).

A024277

E.g.f.: log(1+tanh(x)*tan(x))/2 (even powers only).

Terms

    a(0) =0a(1) =1a(2) =-6a(3) =176a(4) =-8176a(5) =691456a(6) =-86186496a(7) =15358324736

External references