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 A171818 #10 Aug 06 2014 17:17:44 %S A171818 0,1,2,2,2,2,2,2,2,2,10,11,12,12,12,12,12,12,12,12,20,21,22,22,22,22, %T A171818 22,22,22,22,20,21,22,22,22,22,22,22,22,22,20,21,22,22,22,22,22,22,22, %U A171818 22,20,21,22,22,22,22,22,22,22,22,20,21,22,22,22,22,22,22,22,22,20,21,22,22,22 %N A171818 Lunar product 2 X n in base 10. %H A171818 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 A171818 <a href="/index/Di#dismal">Index entries for sequences related to dismal (or lunar) arithmetic</a> %Y A171818 Cf. A162672. %K A171818 nonn,base %O A171818 0,3 %A A171818 _N. J. A. Sloane_, Oct 15 2010