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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; 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.

LINKS

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

CROSSREFS

Cf. A030445, A030444, A030446, A030448.

Sequence in context: A121667 A291844 A093991 * A302369 A317899 A076936

Adjacent sequences:  A030444 A030445 A030446 * A030448 A030449 A030450

KEYWORD

nonn

AUTHOR

David W. Wilson

EXTENSIONS

Corrected and extended by Joseph Myers, May 21, 2004

STATUS

approved

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Last modified December 15 01:20 EST 2018. Contains 318141 sequences. (Running on oeis4.)