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 A105835 #5 Jun 18 2018 15:11:13 %S A105835 1,10,11,6,5,4,9,13,22,8,14,15,26,21,17,30,47,19,28,20,33,27,60,7,2, %T A105835 24,56,34,12,46,36,82,50,32,18,45,38,35,3,54,57,25,42,16,58,63,106,40, %U A105835 66,43,23,126,72,104,70,61,39,100,51,49,156,160,31,129,130,144,162,81,68 %N A105835 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)=10. %H A105835 Ivan Neretin, <a href="/A105835/b105835.txt">Table of n, a(n) for n = 1..10000</a> %Y A105835 Cf. A105822, A105828-A105836. %K A105835 nonn %O A105835 1,2 %A A105835 _Zak Seidov_, Apr 22 2005