

A068609


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


7



1, 14, 5, 20, 23, 10, 3, 16, 19, 22, 9, 12, 15, 18, 7, 24, 11, 4, 17, 6, 21, 8, 25, 2, 13, 58, 33, 62, 37, 68, 41, 72, 75, 46, 79, 50, 27, 54, 31, 60, 35, 64, 67, 40, 71, 74, 45, 78, 49, 52, 29, 56, 59, 34, 63, 66, 39, 70, 43, 76
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OFFSET

0,2


COMMENTS

One of eight possible knight's tours. Squares are numbered in a clockwise spiral. Enumerates all positive integers.


LINKS

Table of n, a(n) for n=0..59.
Frank Ellermann, Sequences based on a spiral of the natural numbers


CROSSREFS

Cf. A068608, A068610, A068611, A068612, A068613, A068614, A068615.
Sequence in context: A124600 A084676 A180848 * A166208 A239863 A118780
Adjacent sequences: A068606 A068607 A068608 * A068610 A068611 A068612


KEYWORD

nonn,easy


AUTHOR

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


EXTENSIONS

a(56), which had been shown as 37, corrected to 39 by Kevin Ryde, Jan 17 2012


STATUS

approved



