a(n) is square mod a(i), i < n; a(n) prime; a(1) = 2.

Terms

a(0) =2a(1) =3a(2) =7a(3) =37a(4) =67a(5) =127a(6) =211a(7) =1999a(8) =3823a(9) =5623a(10) =5779a(11) =12163a(12) =17683a(13) =41227a(14) =180667a(15) =186727a(16) =1901209a(17) =5176711a(18) =5830819a(19) =10593997a(20) =36065149a(21) =66423067a(22) =89635303a(23) =117961621a(24) =121703311a(25) =225511939a(26) =410967463