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A093877
Number of fixed n-celled polyzebras (or zebra-move-connected polyominoes).
4
1, 4, 28, 234, 2162, 21272, 218740, 2323730, 25314097, 281299736, 3176220308, 36332751862, 420086210688
OFFSET
1,2
COMMENTS
A polyzebra is a (2,3) leaper. A polyzebra need not be connected in the usual edge-connected sense.
CROSSREFS
Cf. A030444 (polyknights), A093989, A093990, A093991, A093992.
Sequence in context: A202824 A046904 A030444 * A151830 A354693 A112113
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