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 A113507 #10 Dec 19 2015 13:44:40
%S A113507 1362,1843,2540,4280,5507,6896,14601,15143,17547,18393,20337,22710,
%T A113507 23560,25887,27487,30728,32286,32615,33144,34499,37194,43422,46075,
%U A113507 46167,47293,47497,56125,58465,58495,60552,60911,62069,62091,65743
%N A113507 Numbers whose square root in base 10 starts with 10 distinct digits.
%H A113507 Harvey P. Dale, <a href="/A113507/b113507.txt">Table of n, a(n) for n = 1..400</a>
%e A113507 sqrt(1362) = 36.90528417...
%t A113507 Do[If[Union@Take[RealDigits[s = Sqrt[k], 10, 20][[1]], 10] == Range[0, 9], Print[{k, N[s, 15]}]], {k, 10^5}]
%t A113507 Select[Range[75000],Sort[RealDigits[Sqrt[#],10,10][[1]]]==Range[0,9]&] (* _Harvey P. Dale_, Dec 19 2015 *)
%K A113507 base,easy,nonn
%O A113507 1,1
%A A113507 _Giovanni Resta_, Jan 11 2006
%E A113507 More terms from _Robert G. Wilson v_, Jan 12 2006