Nonsquares mod 68.

Terms

a(0) =2a(1) =3a(2) =5a(3) =6a(4) =7a(5) =10a(6) =11a(7) =12a(8) =14a(9) =15a(10) =18a(11) =19a(12) =20a(13) =22a(14) =23a(15) =24a(16) =26a(17) =27a(18) =28a(19) =29a(20) =30a(21) =31a(22) =34a(23) =35a(24) =37a(25) =38a(26) =39a(27) =40a(28) =41a(29) =42