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 A067475 #10 Oct 01 2016 05:32:09
%S A067475 529,5041,50176,501264,5004169,50013184,500014321,5000045521,
%T A067475 50000090449,500000309449,5000000100624,50000002660624,
%U A067475 500000010062400,5000000124641041,50000000111812804,500000001150395524
%N A067475 Smallest n-digit square starting with 5.
%H A067475 Robert Israel, <a href="/A067475/b067475.txt">Table of n, a(n) for n = 3..998</a>
%F A067475 a(n) = ceiling(sqrt(5*10^(n-1)))^2, n>2. - _Rick L. Shepherd_, Feb 18 2002
%p A067475 seq(ceil(sqrt(5*10^(d-1)))^2, d=3..30); # _Robert Israel_, Sep 30 2016
%t A067475 Table[Ceiling[Sqrt[5*10^n]]^2,{n,2,20}] (* _Harvey P. Dale_, Aug 23 2014 *)
%o A067475 (PARI) for(n=3,22,a=ceil(sqrt(5*10^(n-1)))^2; print(a))
%Y A067475 Cf. A035072 (roots), A045788, A067479 (2..9).
%K A067475 base,easy,nonn
%O A067475 3,1
%A A067475 _Amarnath Murthy_, Feb 09 2002
%E A067475 More terms from _Rick L. Shepherd_, Feb 18 2002