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 A235262 #7 Apr 25 2016 12:00:16 %S A235262 1,2,3,4,6,8,5,9,12,7,13,11,15,16,10,17,24,14,18,26,21,32,19,33,22,34, %T A235262 20,36,25,35,27,37,28,39,48,23,38,50,29,49,31,52,30,51,42,55,41,56,40, %U A235262 58,47,60,64,43,65,44,66,45,53,67,54,68,57,70,46,71,61 %N A235262 Lexicographically earliest sequence of distinct positive integers such that the derived sequence (b(n)) = (a(n) XOR a(n+1)) contains only distinct terms (XOR stands for the binary XOR operator). %H A235262 Paul Tek, <a href="/A235262/b235262.txt">Table of n, a(n) for n = 1..10000</a> %H A235262 Paul Tek, <a href="/A235262/a235262.txt">PERL program for this sequence</a> %o A235262 (Perl) See Link section. %Y A235262 Cf. A081145, A235263. %K A235262 nonn %O A235262 1,2 %A A235262 _Paul Tek_, Jan 05 2014