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 A171222 #10 Aug 06 2014 16:12:50 %S A171222 0,1,100,111,10000,10101,11100,11111,1000000,1001001,1010100,1011111, %T A171222 1110000,1111100,1111101,1111111,100000000,100010001,100100100, %U A171222 100110111,101010000,101010101,101111100,101111111,111000000,111011001 %N A171222 Squares in lunar arithmetic in base 2 written in base 2. %H A171222 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 A171222 <a href="/index/Di#dismal">Index entries for sequences related to dismal (or lunar) arithmetic</a> %Y A171222 Cf. A067398. %K A171222 nonn,base %O A171222 0,3 %A A171222 _N. J. A. Sloane_, Oct 02 2010