%I #18 May 10 2019 17:07:32
%S 1,24,7,18,15,12,9,22,19,16,3,10,23,20,5,14,11,8,21,6,17,4,13,2,25,80,
%T 47,76,43,70,39,66,63,34,59,56,29,52,49,78,45,74,71,40,67,64,35,60,31,
%U 54,27,50,79,46,75,72,41,68,37,62
%N Path of a knight's tour on an infinite chessboard.
%C One of eight possible knight's tours. Squares are numbered in a clockwise spiral. Enumerates all positive integers.
%H Hugo Pfoertner, <a href="/A068613/b068613.txt">Table of n, a(n) for n = 0..1088</a>
%H Frank Ellermann, <a href="http://oeis.org/A068225/a068225.html">Sequences based on a spiral of the natural numbers</a>
%Y Cf. A068608, A068609, A068610, A068611, A068612, A068614, A068615.
%K nonn,look
%O 0,2
%A Hans Secelle and Albrecht Heeffer (albrecht.heeffer(AT)pandora.be), Mar 09 2002
