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 A045791 #14 Sep 04 2021 21:35:07
%S A045791 729,784,7056,7225,7396,7569,7744,7921,70225,70756,71289,71824,72361,
%T A045791 72900,73441,73984,74529,75076,75625,76176,76729,77284,77841,78400,
%U A045791 78961,79524,700569,702244,703921,705600,707281,708964,710649,712336
%N A045791 Squares with initial digit '7'.
%F A045791 a(n) = A045861(n)^2. - _Michel Marcus_, Sep 04 2021
%t A045791 Flatten[Table[Range[Ceiling[Sqrt[7 10^n]],Floor[Sqrt[8 10^n]]]^2,{n,5}]] (* _Harvey P. Dale_, Jun 15 2011 *)
%Y A045791 Cf. A045861.
%Y A045791 Cf. A045784, A045785, A045786, A045787, A045788, A045789, A045792, A045793.
%K A045791 nonn,base
%O A045791 1,1
%A A045791 _Jeff Burch_