Primes of the form 16n^2 + 121.

Terms

a(0) =137a(1) =521a(2) =1721a(3) =3257a(4) =4217a(5) =5897a(6) =6521a(7) =7177a(8) =9337a(9) =10937a(10) =13577a(11) =15497a(12) =18617a(13) =20857a(14) =27017a(15) =41737a(16) =55817a(17) =65657a(18) =80777a(19) =90121a(20) =105097a(21) =113017a(22) =118457a(23) =126857a(24) =141497a(25) =163337a(26) =173177a(27) =176521a(28) =179897a(29) =197257