E.g.f.: exp( Integral exp(x^2) dx ).

Terms

a(0) =1a(1) =1a(2) =1a(3) =3a(4) =9a(5) =33a(6) =153a(7) =723a(8) =4209a(9) =25377a(10) =172689a(11) =1269699a(12) =9918009a(13) =84824577a(14) =755458281a(15) =7273792467a(16) =73106578017a(17) =778521070017