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 A186442 #16 Aug 06 2014 16:23:20 %S A186442 0,1,2,3,4,5,6,7,8,81,9,3,5,7,9,11,13,15,17,83,83,27,15,17,19,21,23, %T A186442 25,27,85,85,85,43,27,29,31,33,35,37,87,87,87,87,57,39,41,43,45,47,89, %U A186442 89,89,89,89,69,51,53,55,57,91,91,91,91,91,91,79,63,65,67 %N A186442 In base 2, excess of lunar sum of lunar divisors of n over number of lunar divisors of n. %H A186442 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 A186442 <a href="/index/Di#dismal">Index entries for sequences related to dismal (or lunar) arithmetic</a> %Y A186442 Equals A087416(n) - A087029(n). %K A186442 nonn %O A186442 1,3 %A A186442 _N. J. A. Sloane_, Feb 21 2011