Primes of the form 2*p^2 - 1, where p is prime.

Terms

a(0) =7a(1) =17a(2) =97a(3) =241a(4) =337a(5) =577a(6) =3361a(7) =3697a(8) =6961a(9) =10657a(10) =23761a(11) =25537a(12) =32257a(13) =37537a(14) =49297a(15) =64081a(16) =65521a(17) =77617a(18) =79201a(19) =89041a(20) =126001a(21) =138337a(22) =153457a(23) =171697a(24) =193441a(25) =249217a(26) =269377a(27) =287281a(28) =334561a(29) =351121