Primes of the form 5n^2 - 1.

Terms

a(0) =19a(1) =79a(2) =179a(3) =499a(4) =719a(5) =1279a(6) =1619a(7) =1999a(8) =2879a(9) =3919a(10) =5119a(11) =5779a(12) =7219a(13) =8819a(14) =9679a(15) =11519a(16) =15679a(17) =19219a(18) =20479a(19) =24499a(20) =25919a(21) =28879a(22) =33619a(23) =35279a(24) =36979a(25) =40499a(26) =44179a(27) =49999a(28) =56179a(29) =71999