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One of eight possible knight's tours. Squares are numbered in a clockwise spiral. Enumerates all positive integers.
Table of n, a(n) for n=0..59.
Frank Ellermann, Sequences based on a spiral of the natural numbers
Cf. A068609, A068610, A068611, A068612, A068613, A068614, A068615.
Sequence in context: A110409 A064211 A050133 * A195817 A228314 A243239
Adjacent sequences: A068605 A068606 A068607 * A068609 A068610 A068611
Hans Secelle and Albrecht Heeffer (albrecht.heeffer(AT)pandora.be), Mar 09 2002