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

Terms

a(0) =2a(1) =7a(2) =23a(3) =53a(4) =97a(5) =151a(6) =227a(7) =311a(8) =419a(9) =541a(10) =661a(11) =827a(12) =1009a(13) =1193a(14) =1427a(15) =1619a(16) =1879a(17) =2143a(18) =2437a(19) =2741a(20) =3083a(21) =3461a(22) =3803a(23) =4211a(24) =4637a(25) =5051a(26) =5519a(27) =6007a(28) =6481a(29) =6997