Expansion of e.g.f.: exp(sinh(tanh(x))).

Terms

a(0) =1a(1) =1a(2) =1a(3) =0a(4) =-3a(5) =-12a(6) =-27a(7) =248a(8) =2425a(9) =-3504a(10) =-143031a(11) =-115904a(12) =8956533a(13) =17130688a(14) =-618394579a(15) =-265254272a(16) =46232494321a(17) =-452604387072