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 A157466 #3 Mar 30 2012 18:51:04 %S A157466 1,2,3,4,5,6,7,7,8,9,10,11,12,12,13,13,14,14,14,15,15,16,17,17,18,19, %T A157466 20,20,21,22,22,23,24,24,25,25,26,26,26,26,27,28,28,28,29,29,29,29,30, %U A157466 31,31,31,32,32,32,32,33,34,34,35,35,36,37,37,38,39,40,41,41,42,42,42,43 %N A157466 Numbers of numbers <= n, that are squares when inserting at most one digit in decimal representation (see A157465). %C A157466 a(n) > n/2 for n <= 131; %C A157466 a(n) <= n/2 for n > 131; %C A157466 a(n) <= a(n+1); a(n)/n --> 0 for n --> oo; %C A157466 a(A157465(n+1)) = a(A157465(n)) + 1. %H A157466 R. Zumkeller, <a href="/A157466/b157466.txt">Table of n, a(n) for n = 0..10000</a> %Y A157466 A003059, A000196, A157464. %K A157466 base,nonn %O A157466 0,2 %A A157466 _Reinhard Zumkeller_, Mar 01 2009