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 A186443 #12 Aug 06 2014 15:54:06 %S A186443 9,18,90,180,819,1638,7461,14922,67968 %N A186443 Records in A087029. %H A186443 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 A186443 <a href="/index/Di#dismal">Index entries for sequences related to dismal (or lunar) arithmetic</a> %Y A186443 Cf. A186510. %K A186443 nonn,more %O A186443 1,1 %A A186443 _N. J. A. Sloane_, Feb 21 2011