Primes of the form p^2 + (p + 1)/2 where p is also prime.

Terms

a(0) =11a(1) =53a(2) =127a(3) =541a(4) =977a(5) =1871a(6) =3511a(7) =4523a(8) =5077a(9) =11503a(10) =16193a(11) =19391a(12) =22877a(13) =57241a(14) =63127a(15) =80231a(16) =129061a(17) =134873a(18) =143831a(19) =229681a(20) =241327a(21) =344863a(22) =359101a(23) =398477a(24) =418933a(25) =434611a(26) =619763a(27) =658127a(28) =745201a(29) =845021