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 A189708 #10 Jun 03 2021 19:35:48 %S A189708 2,3,6,9,11,12,14,15,18,20,21,23,24,27,29,30,33,36,38,39,42,45,47,48, %T A189708 50,51,54,56,57,60,63,65,66,69,72,74,75,77,78,81,83,84,87,90,92,93,95, %U A189708 96,99,101,102,104,105,108,110,111,114,117,119,120,122,123,126,128,129,131,132,135,137,138,141,144,146,147,150,153,155,156,158 %N A189708 Positions of 1 in A189706; complement of A189707. %C A189708 See A189706. %t A189708 (See A189706.) %Y A189708 Cf. A189706, A189707, A189709. %K A189708 nonn %O A189708 1,1 %A A189708 _Clark Kimberling_, Apr 25 2011