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A030447 Number of n-celled polyknights with bilateral symmetry. 4
1, 0, 4, 2, 30, 32, 274, 403, 2694, 4604, 27365 (list; graph; refs; listen; history; 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.

CROSSREFS

Cf. A030445, A030444, A030446, A030448.

Sequence in context: A200032 A121667 A093991 * A076936 A086482 A078758

Adjacent sequences:  A030444 A030445 A030446 * A030448 A030449 A030450

KEYWORD

nonn

AUTHOR

Dave Wilson

EXTENSIONS

Corrected and extended by Joseph S. Myers (jsm(AT)polyomino.org.uk), May 21, 2004

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Last modified February 16 11:51 EST 2012. Contains 205908 sequences.