Expansion of e.g.f.: exp(x^2)*(exp(2*x)+1)/2.

Terms

a(0) =1a(1) =1a(2) =4a(3) =10a(4) =44a(5) =156a(6) =752a(7) =3256a(8) =17040a(9) =84496a(10) =475712a(11) =2611104a(12) =15687872a(13) =93376960a(14) =594638592a(15) =3786534784a(16) =25412227328a(17) =171474649344