a(n) = prime(n^2 + n + 1).

Terms

a(0) =2a(1) =5a(2) =17a(3) =41a(4) =73a(5) =127a(6) =191a(7) =269a(8) =367a(9) =467a(10) =607a(11) =751a(12) =919a(13) =1093a(14) =1297a(15) =1523a(16) =1753a(17) =2027a(18) =2309a(19) =2621a(20) =2909a(21) =3299a(22) =3623a(23) =4007a(24) =4421a(25) =4861a(26) =5303a(27) =5749a(28) =6257a(29) =6763