Expansion of log(1+tanh(x)*tan(x)).

A009398

Expansion of log(1+tanh(x)*tan(x)).

Terms

    a(0) =0a(1) =2a(2) =-12a(3) =352a(4) =-16352a(5) =1382912a(6) =-172372992a(7) =30716649472

External references