Expansion of e.g.f.: tanh(log(1+x)*cos(x)).

Terms

a(0) =0a(1) =1a(2) =-1a(3) =-3a(4) =12a(5) =15a(6) =-375a(7) =819a(8) =13888a(9) =-108483a(10) =-551925a(11) =13545961a(12) =-22418484a(13) =-1621656517a(14) =14484838277a(15) =186206989903