Expansion of exp(log(1+x)/cosh(x)).

Terms

a(0) =1a(1) =1a(2) =0a(3) =-3a(4) =-6a(5) =35a(6) =135a(7) =-476a(8) =-6300a(9) =14349a(10) =298515a(11) =254056a(12) =-26673042a(13) =-26975169a(14) =1931306377a(15) =16803854768a(16) =-336040323112