Primes p such that q = 4*p+1 and r = (2*p+1)/3 are also primes.

Terms

a(0) =7a(1) =43a(2) =79a(3) =163a(4) =673a(5) =853a(6) =919a(7) =1063a(8) =1429a(9) =1549a(10) =1663a(11) =2143a(12) =2683a(13) =3229a(14) =3499a(15) =4993a(16) =5119a(17) =5653a(18) =5779a(19) =6229a(20) =6343a(21) =7333a(22) =7459a(23) =7669a(24) =8353a(25) =8539a(26) =8719a(27) =9829a(28) =10009a(29) =10243