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 A045785 #16 Sep 04 2021 17:33:23
%S A045785 25,225,256,289,2025,2116,2209,2304,2401,2500,2601,2704,2809,2916,
%T A045785 20164,20449,20736,21025,21316,21609,21904,22201,22500,22801,23104,
%U A045785 23409,23716,24025,24336,24649,24964,25281,25600,25921,26244,26569
%N A045785 Squares with initial digit '2'.
%F A045785 a(n) = A045856(n)^2. - _Michel Marcus_, Sep 04 2021
%t A045785 Flatten[Table[Range[Ceiling[Sqrt[2 10^n]],Floor[Sqrt[3 10^n]]]^2,{n,4}]](* _Harvey P. Dale_, Jun 15 2011 *)
%Y A045785 Cf. A045856.
%Y A045785 Cf. A045784, A045786, A045787, A045788, A045789, A045791, A045792, A045793.
%K A045785 nonn,base
%O A045785 1,1
%A A045785 _Jeff Burch_