This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A045789 #14 Sep 04 2021 21:35:26
%S A045789 64,625,676,6084,6241,6400,6561,6724,6889,60025,60516,61009,61504,
%T A045789 62001,62500,63001,63504,64009,64516,65025,65536,66049,66564,67081,
%U A045789 67600,68121,68644,69169,69696,600625,602176,603729,605284,606841
%N A045789 Squares with initial digit '6'.
%F A045789 a(n) = A045860(n)^2. - _Michel Marcus_, Sep 04 2021
%t A045789 Flatten[Table[Range[Ceiling[Sqrt[6 10^n]],Floor[Sqrt[7 10^n]]]^2,{n,5}]] (* _Harvey P. Dale_, Jun 15 2011 *)
%Y A045789 Cf. A045860.
%Y A045789 Cf. A045784, A045785, A045786, A045787, A045788, A045791, A045792, A045793.
%K A045789 nonn,base
%O A045789 1,1
%A A045789 _Jeff Burch_