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 A171789 #13 Aug 06 2014 16:14:23 %S A171789 3,14,24,34,40,41,42,43,44,104,115,125,135,145,150,151,152,153,154, %T A171789 155,204,214,225,235,245,250,251,252,253,254,255,304,314,324,335,345, %U A171789 350,351,352,353,354,355,401,402,403,404,412,413,414,423,424 %N A171789 Numbers of rank 6 in the poset of lunar numbers. %H A171789 David Applegate and N. J. A. Sloane, <a href="/A171789/b171789.txt">Table of n, a(n) for n = 1..5401</a> %H A171789 D. Applegate, M. LeBrun and N. J. A. Sloane, <a href="http://arxiv.org/abs/1107.1130">Dismal Arithmetic</a> [Note: we have now changed the name from "dismal arithmetic" to "lunar arithmetic" - the old name was too depressing] %H A171789 <a href="/index/Di#dismal">Index entries for sequences related to dismal (or lunar) arithmetic</a> %K A171789 nonn,base %O A171789 1,1 %A A171789 _David Applegate_ and _N. J. A. Sloane_, Oct 14 2010