E.g.f. exp(sin(sin(x))).

Terms

a(0) =1a(1) =1a(2) =1a(3) =-1a(4) =-7a(5) =-7a(6) =73a(7) =335a(8) =-687a(9) =-12367a(10) =-19471a(11) =461119a(12) =2839561a(13) =-15282199a(14) =-260138759a(15) =-15084017a(16) =22560194593a(17) =113205762401