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 A068614 #18 Jun 04 2019 02:50:44 %S A068614 1,12,9,22,19,16,3,10,23,20,5,14,11,24,7,18,15,2,25,8,21,6,17,4,13,56, %T A068614 29,52,49,78,45,74,71,40,67,64,35,60,31,54,27,50,79,46,75,72,41,68,37, %U A068614 62,33,58,55,28,51,80,47,76,43,70 %N A068614 Path of a knight's tour on an infinite chessboard. %C A068614 One of eight possible knight's tours. Squares are numbered in a clockwise spiral. Enumerates all positive integers. %H A068614 Hugo Pfoertner, <a href="/A068614/b068614.txt">Table of n, a(n) for n = 0..1088</a> [Offset adapted by _Georg Fischer_, Jun 04 2019] %H A068614 Frank Ellermann, <a href="http://oeis.org/A068225/a068225.html">Sequences based on a spiral of the natural numbers</a> %Y A068614 Cf. A068608, A068609, A068610, A068611, A068612, A068613, A068615. %K A068614 nonn %O A068614 0,2 %A A068614 Hans Secelle and Albrecht Heeffer (albrecht.heeffer(AT)pandora.be), Mar 09 2002