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 A189223 #7 Feb 12 2018 16:45:26 %S A189223 4,7,8,12,13,14,16,21,22,24,25,26,28,29,34,36,39,40,42,44,46,47,48,49, %T A189223 52,55,56,61,63,64,66,67,72,74,75,76,78,79,80,84,85,86,87,88,89,92,97, %U A189223 101,102,103,104,106,108,109,115,117,120,121,122,124,126,132,134,136,138,139,140,141,142 %N A189223 Positions of 0 in A189222; complement of A189224. %H A189223 Ivan Neretin, <a href="/A189223/b189223.txt">Table of n, a(n) for n = 1..10000</a> %t A189223 (See A189222.) %Y A189223 Cf. A189222, A189224. %K A189223 nonn %O A189223 1,1 %A A189223 _Clark Kimberling_, Apr 18 2011