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 A105829 #6 Jun 17 2018 19:01:25 %S A105829 1,4,5,6,8,14,9,18,7,11,30,41,15,26,21,17,38,39,27,12,20,13,33,46,19, %T A105829 2,72,74,23,51,54,96,24,36,60,56,32,78,47,10,37,65,102,167,67,100,68, %U A105829 59,105,164,45,119,48,71,29,42,135,132,3,129,270,351,66,40,64,90,61,53,114 %N A105829 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)=4. %H A105829 Ivan Neretin, <a href="/A105829/b105829.txt">Table of n, a(n) for n = 1..10000</a> %Y A105829 Cf. A105822, A105828-A105836. %K A105829 nonn,look %O A105829 1,2 %A A105829 _Zak Seidov_, Apr 22 2005