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

Terms

a(0) =1a(1) =0a(2) =0a(3) =3a(4) =6a(5) =10a(6) =105a(7) =651a(8) =2968a(9) =18936a(10) =152505a(11) =1164295a(12) =9109056a(13) =80012868a(14) =756041377a(15) =7387199925a(16) =75535791360a(17) =816560002576