Nonsquares mod 31.

Terms

a(0) =3a(1) =6a(2) =11a(3) =12a(4) =13a(5) =15a(6) =17a(7) =21a(8) =22a(9) =23a(10) =24a(11) =26a(12) =27a(13) =29a(14) =30