Expansion of e.g.f. exp(x + tanh(x)).

Terms

a(0) =1a(1) =2a(2) =4a(3) =6a(4) =0a(5) =-32a(6) =-24a(7) =640a(8) =2176a(9) =-16832a(10) =-138496a(11) =521216a(12) =10367616a(13) =-8750336a(14) =-942458368a(15) =-2101041920a(16) =102567493632a(17) =621205094400