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

Terms

a(0) =1a(1) =1a(2) =3a(3) =10a(4) =38a(5) =156a(6) =692a(7) =3256a(8) =16200a(9) =84496a(10) =460592a(11) =2611104a(12) =15355232a(13) =93376960a(14) =585989952a(15) =3786534784a(16) =25152768128a(17) =171474649344