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

Terms

a(0) =0a(1) =1a(2) =-1a(3) =-1a(4) =0a(5) =49a(6) =-165a(7) =-393a(8) =-504a(9) =66753a(10) =-414225a(11) =21295a(12) =-15435816a(13) =561504241a(14) =-5685997317a(15) =34755442407a(16) =-746778152400