Nonsquares mod 53.

Terms

a(0) =2a(1) =3a(2) =5a(3) =8a(4) =12a(5) =14a(6) =18a(7) =19a(8) =20a(9) =21a(10) =22a(11) =23a(12) =26a(13) =27a(14) =30a(15) =31a(16) =32a(17) =33a(18) =34a(19) =35a(20) =39a(21) =41a(22) =45a(23) =48a(24) =50a(25) =51