n! mod n^3.

Terms

a(0) =0a(1) =2a(2) =6a(3) =24a(4) =120a(5) =72a(6) =238a(7) =384a(8) =567a(9) =800a(10) =110a(11) =0a(12) =2184a(13) =784a(14) =0a(15) =0a(16) =1428a(17) =0a(18) =703a(19) =0a(20) =0a(21) =2904a(22) =4209a(23) =0a(24) =0a(25) =13520a(26) =0a(27) =0a(28) =15109a(29) =0