OFFSET
0,2
COMMENTS
One of eight possible knight's tours. Squares are numbered in a clockwise spiral. Enumerates all positive integers.
LINKS
Hugo Pfoertner, Table of n, a(n) for n = 0..1088 [Offset adapted by Georg Fischer, Jun 04 2019]
Frank Ellermann, Sequences based on a spiral of the natural numbers
Hugo Pfoertner, Illustration of initial terms.
CROSSREFS
KEYWORD
nonn
AUTHOR
Hans Secelle and Albrecht Heeffer (albrecht.heeffer(AT)pandora.be), Mar 09 2002
STATUS
approved