Smallest prime == -1 modulo prime(n).

Terms

a(0) =3a(1) =2a(2) =19a(3) =13a(4) =43a(5) =103a(6) =67a(7) =37a(8) =137a(9) =173a(10) =61a(11) =73a(12) =163a(13) =257a(14) =281a(15) =211a(16) =353a(17) =487a(18) =401a(19) =283a(20) =1021a(21) =157a(22) =331a(23) =1423a(24) =193a(25) =1009a(26) =617a(27) =641a(28) =653a(29) =677