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 A105830 #5 Jun 17 2018 19:01:48 %S A105830 1,5,6,8,14,4,10,24,18,15,3,12,36,21,2,19,33,52,28,27,55,78,16,62,35, %T A105830 87,54,141,25,46,71,42,29,13,90,7,26,45,50,80,40,75,115,58,57,43,44, %U A105830 84,53,22,31,60,91,37,20,17,63,110,32,96,56,132,108,135,138,61,65,114,143,100 %N A105830 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)=5. %H A105830 Ivan Neretin, <a href="/A105830/b105830.txt">Table of n, a(n) for n = 1..10000</a> %Y A105830 Cf. A105822, A105828-A105836. %K A105830 nonn %O A105830 1,2 %A A105830 _Zak Seidov_, Apr 22 2005