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 A157465 #3 Mar 30 2012 18:51:04 %S A157465 0,1,2,3,4,5,6,8,9,10,11,12,14,16,19,21,22,24,25,26,28,29,31,32,34,36, %T A157465 40,41,44,48,49,52,56,57,59,61,62,64,65,66,67,69,72,74,76,78,79,81,84, %U A157465 89,90,91,96,100,102,104,108,109,115,116,121,122,124,125,126,129,136 %N A157465 Numbers seen as squares with at most one missing digit in decimal representation. %C A157465 A157464(a(n)) > 0; A000290(n) is a subsequence; %C A157465 A157466 gives numbers of these numbers <= n, A157466(a(n+1))=A157466(a(n))+1. %H A157465 R. Zumkeller, <a href="/A157465/b157465.txt">Table of n, a(n) for n = 1..1000</a> %e A157465 Insert 5 into 200: 2500=50^2, therefore 200 is a term; %e A157465 insert 4 into 201: 2401=49^2, therefore 201 is a term; %e A157465 append 5 to 202: 2025=45^2, therefore 202 is a term. %K A157465 base,nonn %O A157465 1,3 %A A157465 _Reinhard Zumkeller_, Mar 01 2009