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A030446 Number of n-celled polyknights (polyominoes connected by knight's moves). 4
1, 1, 6, 35, 290, 2680, 26379, 267598, 2758016, 28749456, 302120154 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

A polyknight is a variant of a polyomino in which two tiles a knight's move apart are considered adjacent. A polyknight need not be connected in the sense of a polyomino.

These are free polyknights.

LINKS

Table of n, a(n) for n=1..11.

CROSSREFS

Cf. A030445, A030444, A030447, A030448.

Sequence in context: A187443 A087631 A167579 * A093989 A051337 A192996

Adjacent sequences:  A030443 A030444 A030445 * A030447 A030448 A030449

KEYWORD

nonn

AUTHOR

David W. Wilson

EXTENSIONS

Corrected and extended by Joseph Myers, May 21, 2004

STATUS

approved

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Last modified November 23 16:08 EST 2014. Contains 249851 sequences.