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%I #9 Dec 22 2019 03:37:11
%S 2,3,5,6,8,10,11,12,13,14,15,17,19,20,21,23,24,26,27,29,30,31,32,33,
%T 34,35,38,39,40,41,42,44,45,47,48,50,51,52,53,54,55,56,57,59,60,61,62
%N Nonsquares mod 63.
%t Complement[Range[0, 62], PowerMod[Range[63], 2, 63]] (* _Alonso del Arte_, Dec 21 2019 *)
%o (Scala) (0 to 62).diff((1 to 63).map(n => (n * n) % 63)) // _Alonso del Arte_, Dec 21 2019
%Y Cf. A010424.
%K nonn,fini,full,easy
%O 1,1
%A _N. J. A. Sloane_