Primes of form 3*p*(p-1)+1 with p also a prime.

Terms

a(0) =7a(1) =19a(2) =61a(3) =127a(4) =331a(5) =2437a(6) =2791a(7) =5419a(8) =8269a(9) =10267a(10) =13267a(11) =23497a(12) =35317a(13) =55897a(14) =73477a(15) =89269a(16) =115837a(17) =170647a(18) =292969a(19) =360187a(20) =372769a(21) =452797a(22) =603457a(23) =812761a(24) =895987a(25) =929077a(26) =976411a(27) =997057a(28) =1074607a(29) =1125469