Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #27 Sep 08 2022 08:44:37
%S 0,1,4,9,16,21,24,25,29,36,41,44,49,56,61,64,69,76,81,84,89,96
%N Squares mod 100.
%C Range of A002015; subset of A122986. - _Reinhard Zumkeller_, Mar 21 2010
%t Union[PowerMod[Range[100], 2, 100]] (* _Alonso del Arte_, Dec 25 2019 *)
%o (Sage) [quadratic_residues(100)] # _Zerinvary Lajos_, May 28 2009
%o (PARI) A010461=Set(vector(100,n,n^2)%100) \\ _M. F. Hasler_, Mar 03 2014
%o (Scala) (1 to 100).map(n => (n * n) % 100).toSet.toSeq.sorted // _Alonso del Arte_, Dec 25 2019
%o (Magma) [n: n in [0..99] | IsSquare(R! n) where R:= ResidueClassRing(100)]; // _Vincenzo Librandi_, Dec 28 2019
%Y Cf. A010382, A010411, A010462, A010421. - _Reinhard Zumkeller_, Mar 21 2010
%Y Row 100 of A096008.
%Y Cf. A028813.
%K nonn,fini,full,easy
%O 1,3
%A _N. J. A. Sloane_