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 A269331 #6 Apr 03 2016 12:57:14 %S A269331 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26, %T A269331 27,28,29,30,32,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51, %U A269331 52,53,54,55,56,57,58,60,61,63,64,65,66,67,68,69,70,72 %N A269331 Indices k such that A107435(k) = A268057(k). %H A269331 Peter Kagey, <a href="/A269331/b269331.txt">Table of n, a(n) for n = 1..10000</a> %Y A269331 Complement of A269267. %Y A269331 Cf. A107435, A268057. %K A269331 nonn %O A269331 1,2 %A A269331 _Peter Kagey_, Feb 23 2016