Expansion of e.g.f. exp( sinh(sqrt(2)*x) / sqrt(2) ).

Terms

a(0) =1a(1) =1a(2) =1a(3) =3a(4) =9a(5) =25a(6) =105a(7) =443a(8) =1969a(9) =10609a(10) =57265a(11) =338547a(12) =2190969a(13) =14498185a(14) =104277849a(15) =784965803a(16) =6150938593a(17) =51229928929a(18) =440694547681