Nonsquares mod 91.

Terms

a(0) =2a(1) =3a(2) =5a(3) =6a(4) =7a(5) =8a(6) =10a(7) =11a(8) =12a(9) =13a(10) =15a(11) =17a(12) =18a(13) =19a(14) =20a(15) =21a(16) =24a(17) =26a(18) =27a(19) =28a(20) =31a(21) =32a(22) =33a(23) =34a(24) =37a(25) =38a(26) =40a(27) =41a(28) =44a(29) =45