Nonsquares mod 41.

Terms

a(0) =3a(1) =6a(2) =7a(3) =11a(4) =12a(5) =13a(6) =14a(7) =15a(8) =17a(9) =19a(10) =22a(11) =24a(12) =26a(13) =27a(14) =28a(15) =29a(16) =30a(17) =34a(18) =35a(19) =38