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 A186523 #21 Aug 06 2014 17:08:34 %S A186523 2,6,14,34,82,206,526,1378,3674,9950,27278,75514,210634,591054, %T A186523 1666406,4716186,13389434,38113462,108737894,310851770,890244546, %U A186523 2553782246,7337143110,21110531858,60823037522,175471424214,506862346750,1465875933394,4244315841666,12302751068958,35699515448510,103697897085458,301514033677482,877521633678990 %N A186523 In lunar arithmetic in base 3, this is the number of lunar divisors of the number 111...1 (with n 1's). %H A186523 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 A186523 <a href="/index/Di#dismal">Index entries for sequences related to dismal (or lunar) arithmetic</a> %Y A186523 Cf. A079500 (the base 2 analog). %K A186523 nonn,base %O A186523 1,1 %A A186523 _N. J. A. Sloane_, Feb 24 2011