Squares mod 49.

Terms

a(0) =0a(1) =1a(2) =2a(3) =4a(4) =8a(5) =9a(6) =11a(7) =15a(8) =16a(9) =18a(10) =22a(11) =23a(12) =25a(13) =29a(14) =30a(15) =32a(16) =36a(17) =37a(18) =39a(19) =43a(20) =44a(21) =46