Primes of the form 6n^3+1.

Terms

a(0) =7a(1) =163a(2) =751a(3) =1297a(4) =10369a(5) =13183a(6) =131713a(7) =329233a(8) =384001a(9) =413527a(10) =444529a(11) =843649a(12) =1053697a(13) =1429969a(14) =1500283a(15) =2633857a(16) =3072001a(17) =3308209a(18) =4374001a(19) =4521427a(20) =5308417a(21) =5476039a(22) =7986001a(23) =8205787a(24) =9609679a(25) =9858193a(26) =10895089a(27) =13488547