Square-loop primes.

Terms

a(0) =2a(1) =13a(2) =31a(3) =79a(4) =97a(5) =227a(6) =881a(7) =1013a(8) =2797a(9) =3181a(10) =3631a(11) =8101a(12) =22727a(13) =81001a(14) =101363a(15) =109013a(16) =131363a(17) =181813a(18) =272227a(19) =310181a(20) =310901a(21) =318181a(22) =318881a(23) =631013a(24) =636313a(25) =810401a(26) =818101a(27) =901097a(28) =904097a(29) =972227