Squares mod 57.

Terms

a(0) =0a(1) =1a(2) =4a(3) =6a(4) =7a(5) =9a(6) =16a(7) =19a(8) =24a(9) =25a(10) =28a(11) =30a(12) =36a(13) =39a(14) =42a(15) =43a(16) =45a(17) =49a(18) =54a(19) =55