-16352domain: ZAppears in sequencesExpansion of log(1+tanh(x)*tan(x)).at n=4A009398a(n) = (-n^5 + 15*n^4 - 65*n^3 + 125*n^2 - 34*n + 40)/40.at n=18A161713Expansion of e.g.f. log( 1 + log(1 + x)^3 / 3! ).at n=5A346945