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 A171795 #13 Aug 06 2014 16:14:23 %S A171795 1,12,20,21,22,102,113,123,130,131,132,133,201,202,212,223,230,231, %T A171795 232,233,300,310,311,320,321,322,330,331,332,333,1002,1012,1021,1022, %U A171795 1030,1102,1114,1124,1134,1140,1141,1142,1143,1144,1201,1202 %N A171795 Numbers of rank 8 in the poset of lunar numbers. %H A171795 David Applegate and N. J. A. Sloane, <a href="/A171795/b171795.txt">Table of n, a(n) for n = 1..1239</a> %H A171795 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 A171795 <a href="/index/Di#dismal">Index entries for sequences related to dismal (or lunar) arithmetic</a> %K A171795 nonn,base %O A171795 1,2 %A A171795 _David Applegate_ and _N. J. A. Sloane_, Oct 14 2010