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 A284821 #5 Apr 05 2017 08:07:28 %S A284821 1,6,2,3,4,5,10,7,9,12,15,14,24,22,8,20,11,21,13,18,30,26,42,33,70,16, %T A284821 28,17,35,40,66,60,34,48,44,19,25,90,55,45,56,39,84,36,63,105,165,210, %U A284821 38,23,65,77,52,110,120,140,78,132,80,50,51,154,32,130,27 %N A284821 Distinct values of A284761 in order of their appearance as n grows. %C A284821 This sequence is infinite. %H A284821 Rémy Sigrist, <a href="/A284821/b284821.txt">Table of n, a(n) for n = 1..81</a> %H A284821 Rémy Sigrist, <a href="/A284821/a284821.pdf">Illustration of the first terms</a> %Y A284821 Cf. A284761. %K A284821 nonn %O A284821 1,2 %A A284821 _Rémy Sigrist_, Apr 03 2017