%I #13 Jan 29 2018 02:47:37

%S 0,1,4,9,16,20,25,36,41,49,64,65

%N Squares mod 80.

%o (Sage) [quadratic_residues(80)] # _Zerinvary Lajos_, May 28 2009

%K nonn,fini,full

%O 1,3

%A _N. J. A. Sloane_