Primes of the form 10n^2 - 9.

Terms

a(0) =31a(1) =151a(2) =241a(3) =631a(4) =991a(5) =1201a(6) =1951a(7) =2551a(8) =4831a(9) =5281a(10) =9601a(11) =11551a(12) =12241a(13) =13681a(14) =14431a(15) =15991a(16) =18481a(17) =24001a(18) =27031a(19) =28081a(20) =30241a(21) =37201a(22) =38431a(23) =48991a(24) =53281a(25) =54751a(26) =57751a(27) =59281a(28) =62401a(29) =67231