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 A171788 #13 Aug 06 2014 16:14:23 %S A171788 4,15,25,35,45,50,51,52,53,54,55,105,116,126,136,146,156,160,161,162, %T A171788 163,164,165,166,205,215,226,236,246,256,260,261,262,263,264,265,266, %U A171788 305,315,325,336,346,356,360,361,362,363,364,365,366,405 %N A171788 Numbers of rank 5 in the poset of lunar numbers. %H A171788 David Applegate and N. J. A. Sloane, <a href="/A171788/b171788.txt">Table of n, a(n) for n = 1..9835</a> %H A171788 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 A171788 <a href="/index/Di#dismal">Index entries for sequences related to dismal (or lunar) arithmetic</a> %K A171788 nonn,base %O A171788 1,1 %A A171788 _David Applegate_ and _N. J. A. Sloane_, Oct 14 2010