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A093877
Number of fixed n-celled polyzebras (or zebra-move-connected polyominoes).
8
1, 4, 28, 234, 2162, 21272, 218740, 2323730, 25314097, 281299736, 3176220308, 36332751862, 420086210688
(list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
A zebra is a (2,3)-leaper. A polyzebra need not be connected in the usual edge-connected sense.
The first 9 terms coincide with A151830. - John Mason, Jun 24 2025
LINKS
Table of n, a(n) for n=1..13.
Wikipedia, Zebra.
CROSSREFS
Cf. A030444 (polyknights), A093989 (free), A093990 (one-sided), A093991, A093992, A151830.
Sequence in context: A202824 A046904 A030444 * A393836 A394194 A151830
Adjacent sequences: A093874 A093875 A093876 * A093878 A093879 A093880
KEYWORD
nonn,more
AUTHOR
Guenter Stertenbrink (Sterten(AT)aol.com), May 21 2004
EXTENSIONS
a(11) from Joseph Myers, May 21 2004
a(12) (computed by Gadi Aleksandrowicz's program) by Gill Barequet, Jun 09 2011
a(13) from John Mason, Jan 13 2023
STATUS
approved

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Last modified June 10 01:20 EDT 2026. Contains 396449 sequences.
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