Expansion of e.g.f. exp( x * exp(x^2) ).

Terms

a(0) =1a(1) =1a(2) =1a(3) =7a(4) =25a(5) =121a(6) =841a(7) =4831a(8) =40657a(9) =325585a(10) =2913841a(11) =29910871a(12) =301088041a(13) =3532945417a(14) =41595396025a(15) =531109561711