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 A275104 #10 Jul 27 2016 21:28:04 %S A275104 1,4,2,3,5,7,11,6,8,9,12,16,13,14,10,15,33,36,30,23,29,24,25,40,39,37, %T A275104 34,38,43,49,17,50,18,21,47,41,44,42,35,27,45,46,51,19,20,22,31,32,26, %U A275104 28,53,48,52,58,54,60,59,55,57,61,62,63,56,64,122 %N A275104 First row of Hilbert curve in A275103. %H A275104 Kerry Mitchell, <a href="/A275104/b275104.txt">Table of n, a(n) for n = 0..255</a> %Y A275104 Cf. A275103 for the curve, A275105 for the first column. %K A275104 nonn %O A275104 0,2 %A A275104 _Kerry Mitchell_, Jul 16 2016