Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
%I #12 Jan 28 2018 02:28:10
%S 0,1,4,8,9,13,16,17,21,25,32,33,36,49,52,53,60,64
%N Squares mod 68.
%o (Sage) [quadratic_residues(68)] # _Zerinvary Lajos_, May 24 2009
%K nonn,fini,full
%O 1,3
%A _N. J. A. Sloane_