Primes of form k^2 + k + 1.

Terms

a(0) =3a(1) =7a(2) =13a(3) =31a(4) =43a(5) =73a(6) =157a(7) =211a(8) =241a(9) =307a(10) =421a(11) =463a(12) =601a(13) =757a(14) =1123a(15) =1483a(16) =1723a(17) =2551a(18) =2971a(19) =3307a(20) =3541a(21) =3907a(22) =4423a(23) =4831a(24) =5113a(25) =5701a(26) =6007a(27) =6163a(28) =6481a(29) =8011