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 A191420 #26 Sep 14 2017 15:36:17 %S A191420 11,101,1001,1011,10001,10011,10111,12021,12022,100001,100011,100101, %T A191420 100111,101011,101221,101222,102201,102202,102212,102221,103223, %U A191420 103233,110212,112021,112022,120021,120022,120212,120221,120222,121022,121102,122102,122202,132023,133023 %N A191420 Templates for lunar primes in any base (version 3). %C A191420 Every lunar pseudoprime can be obtained by promoting one of the first these terms or its reversal. The first 36 terms are enough to generate all lunar pseudoprimes with at most 6 digits. %H A191420 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 A191420 D. Applegate, M. LeBrun, N. J. A. Sloane, <a href="https://cs.uwaterloo.ca/journals/JIS/VOL14/Sloane/carry2.html">Dismal Arithmetic</a>, J. Int. Seq. 14 (2011) # 11.9.8. %H A191420 <a href="/index/Di#dismal">Index entries for sequences related to dismal (or lunar) arithmetic</a> %Y A191420 Cf. A088574, A171750, A171752. %K A191420 nonn,base %O A191420 1,1 %A A191420 _David Applegate_ and _N. J. A. Sloane_, Jun 02 2011