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A030446 Number of n-celled polyknights (polyominoes connected by knight's moves). 6
1, 1, 6, 35, 290, 2680, 26379, 267598, 2758016, 28749456, 302120154, 3196299285, 34007337629 (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
John Mason, Illustrations
CROSSREFS
Sequence in context: A087631 A167579 A357095 * A093989 A357037 A356460
KEYWORD
nonn,more
AUTHOR
EXTENSIONS
Corrected and extended by Joseph Myers, May 21 2004
a(12)-a(13) from John Mason, Jan 13 2023
STATUS
approved

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Last modified March 18 22:50 EDT 2024. Contains 370951 sequences. (Running on oeis4.)