Nonsquares mod 33.

Terms

a(0) =2a(1) =5a(2) =6a(3) =7a(4) =8a(5) =10a(6) =11a(7) =13a(8) =14a(9) =17a(10) =18a(11) =19a(12) =20a(13) =21a(14) =23a(15) =24a(16) =26a(17) =28a(18) =29a(19) =30a(20) =32