a(n) = (p-1)! mod p^2 where p = n-th prime.

Terms

a(0) =1a(1) =2a(2) =24a(3) =34a(4) =10a(5) =168a(6) =84a(7) =37a(8) =183a(9) =521a(10) =588a(11) =258a(12) =655a(13) =558a(14) =281a(15) =1801a(16) =1592a(17) =3415a(18) =803a(19) =4898a(20) =802a(21) =5766a(22) =1659a(23) =6229a(24) =6789a(25) =7271a(26) =5870a(27) =106a(28) =3269a(29) =10734