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 A171787 #13 Aug 06 2014 16:14:23 %S A171787 5,16,26,36,46,56,60,61,62,63,64,65,66,106,117,127,137,147,157,167, %T A171787 170,171,172,173,174,175,176,177,206,216,227,237,247,257,267,270,271, %U A171787 272,273,274,275,276,277,306,316,326,337,347,357,367,370,371 %N A171787 Numbers of rank 4 in the poset of lunar numbers. %H A171787 David Applegate and N. J. A. Sloane, <a href="/A171787/b171787.txt">Table of n, a(n) for n = 1..16715</a> %H A171787 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 A171787 <a href="/index/Di#dismal">Index entries for sequences related to dismal (or lunar) arithmetic</a> %K A171787 nonn,base %O A171787 1,1 %A A171787 _David Applegate_ and _N. J. A. Sloane_, Oct 14 2010