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 A105834 #5 Jun 18 2018 15:09:38 %S A105834 1,9,10,16,8,3,5,2,7,4,11,15,14,29,18,47,21,26,32,40,12,28,17,6,23,13, %T A105834 36,49,46,95,50,45,35,80,75,155,22,69,76,33,43,20,63,68,91,27,64,51, %U A105834 115,44,71,34,37,62,24,38,25,48,73,70,143,60,83,19,102,72,30,42,144,96,65 %N A105834 For n>2, a(n) not appeared previously is such that a(n-1)^2+4*a(n-2)*a(n) is a minimal square, a(1)=1, a(2)=9. %H A105834 Ivan Neretin, <a href="/A105834/b105834.txt">Table of n, a(n) for n = 1..10000</a> %Y A105834 Cf. A105822, A105828-A105836. %K A105834 nonn %O A105834 1,2 %A A105834 _Zak Seidov_, Apr 22 2005