a(n) = primorial(n) mod n!.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =18a(5) =30a(6) =510a(7) =1470a(8) =22890a(9) =284550a(10) =3171630a(11) =18486930a(12) =45347610a(13) =4254260010a(14) =2349577230a(15) =371965003410