Primes p such that q = 4p^2 + 1 and r = 4q^2 + 1 are also prime.

Terms

a(0) =3a(1) =13a(2) =47a(3) =677a(4) =983a(5) =1013a(6) =1163a(7) =1373a(8) =1567a(9) =1877a(10) =2003a(11) =2333a(12) =2477a(13) =2753a(14) =3463a(15) =4057a(16) =4423a(17) =4993a(18) =7253a(19) =9833a(20) =10993a(21) =11383a(22) =13907a(23) =15413a(24) =15607a(25) =17317a(26) =18517a(27) =19867a(28) =20123a(29) =20533