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A068611 Path of a knight's tour on an infinite chessboard. 9

%I

%S 1,22,9,12,15,18,7,24,11,14,5,20,23,10,3,16,19,8,25,2,13,4,17,6,21,74,

%T 45,78,49,52,29,56,59,34,63,66,39,70,43,76,47,80,51,28,55,58,33,62,37,

%U 68,41,72,75,46,79,50,27,54,31,60

%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="/A068611/b068611.txt">Table of n, a(n) for n = 0..1088</a> [Offset adapted by _Georg Fischer_, Jun 04 2019]

%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, A068612, A068613, A068614, A068615.

%K nonn

%O 0,2

%A Hans Secelle and Albrecht Heeffer (albrecht.heeffer(AT)pandora.be), Mar 09 2002

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Last modified December 4 15:36 EST 2021. Contains 349526 sequences. (Running on oeis4.)