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 A191366 #18 Aug 06 2014 16:04:52 %S A191366 0,4,4,20,59,164,544,1730,5471,17765,55050,173906,546893 %N A191366 Number of base 3 lunar primes of length n. %H A191366 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 A191366 <a href="/index/Di#dismal">Index entries for sequences related to dismal (or lunar) arithmetic</a> %Y A191366 Cf. A130206 and A170806, A169912, A087636. %K A191366 nonn,base,more %O A191366 1,2 %A A191366 _David Applegate_ and _N. J. A. Sloane_, May 31 2011 %E A191366 Additional term from _David Applegate_, Jun 07 2011