Zero, together with positive numbers k such that prime(k) + k is a square.

Terms

a(0) =0a(1) =5a(2) =12a(3) =86a(4) =105a(5) =176a(6) =214a(7) =230a(8) =241a(9) =412a(10) =503a(11) =696a(12) =1065a(13) =1147a(14) =1170a(15) =1273a(16) =1334a(17) =2021a(18) =2455a(19) =2600a(20) =2660a(21) =2772a(22) =3299a(23) =3332a(24) =3365a(25) =4417a(26) =4861a(27) =6478a(28) =6572a(29) =8115