a(n) = (n-1)! + 1 mod n^3.

Terms

a(0) =0a(1) =2a(2) =3a(3) =7a(4) =25a(5) =121a(6) =35a(7) =433a(8) =226a(9) =881a(10) =495a(11) =1a(12) =676a(13) =1233a(14) =2701a(15) =2049a(16) =4420a(17) =1a(18) =4009a(19) =1a(20) =2647a(21) =6425a(22) =4945a(23) =1a(24) =626a(25) =15393a(26) =1a(27) =1a(28) =13137a(29) =1