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%I #13 Jan 29 2018 02:47:29
%S 0,1,2,3,4,6,8,9,12,16,18,19,23,24,25,27,32,35,36,37,38,41,46,48,49,
%T 50,54,55,57,61,64,65,67,69,70,71,72
%N Squares mod 73.
%o (Sage) [quadratic_residues(73)] # _Zerinvary Lajos_, May 24 2009
%K nonn,fini,full
%O 1,3
%A _N. J. A. Sloane_