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Squares mod 57.
0

%I #13 Jan 27 2018 06:26:20

%S 0,1,4,6,7,9,16,19,24,25,28,30,36,39,42,43,45,49,54,55

%N Squares mod 57.

%o (Sage) [quadratic_residues(57)] # _Zerinvary Lajos_, May 24 2009

%K nonn,fini,full

%O 1,3

%A _N. J. A. Sloane_