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 A247262 #13 Sep 14 2014 00:21:24 %S A247262 126609965386962890625,2251582387232059478759765625, %T A247262 35195816356873080847263336181640625, %U A247262 507081064881263080149056017398834228515625,6906141992927910623080625169910490512847900390625,90266080419142123943961730174907133914530277252197265625 %N A247262 Positive squares not ending in 00 that remain squares when prefixed with 100. %C A247262 Squares of A247312. %H A247262 Chai Wah Wu, <a href="/A247262/b247262.txt">Table of n, a(n) for n = 1..85</a> %e A247262 126609965386962890625 and 100126609965386962890625 are both squares. %o A247262 (PARI) %o A247262 for(n=1,10^30,if(n^2%100&&issquare(10^(#Str(n^2)+2)+n^2),print1(n^2,", "))) \\ _Derek Orr_, Sep 13 2014 %Y A247262 Cf. A247261, A247263, A247264, A247312. %K A247262 nonn,base %O A247262 1,1 %A A247262 _Chai Wah Wu_, Sep 10 2014