a(0)=0, a(n) = (a(n-1) * n) XOR n.

Terms

a(0) =0a(1) =1a(2) =0a(3) =3a(4) =8a(5) =45a(6) =264a(7) =1855a(8) =14832a(9) =133497a(10) =1334960a(11) =14684571a(12) =176214856a(13) =2290793125a(14) =32071103752a(15) =481066556279