Primes equal to a centered pentagonal number plus 1.

Terms

a(0) =2a(1) =7a(2) =17a(3) =107a(4) =227a(5) =277a(6) =457a(7) =857a(8) =1627a(9) =3517a(10) =4517a(11) =5407a(12) =9767a(13) =11057a(14) =13877a(15) =15017a(16) =16607a(17) =20477a(18) =23767a(19) =26267a(20) =27827a(21) =35107a(22) =37517a(23) =41927a(24) =42577a(25) =50767a(26) =53657a(27) =58907a(28) =62017a(29) =68477