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

Terms

a(0) =0a(1) =1a(2) =-1a(3) =5a(4) =-12a(5) =9a(6) =-105a(7) =1413a(8) =-8176a(9) =42801a(10) =-442665a(11) =5165445a(12) =-54556524a(13) =637139385a(14) =-8293744641a(15) =113478922053