Squares mod 63.

Terms

a(0) =0a(1) =1a(2) =4a(3) =7a(4) =9a(5) =16a(6) =18a(7) =22a(8) =25a(9) =28a(10) =36a(11) =37a(12) =43a(13) =46a(14) =49a(15) =58