A093877 - OEIS

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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

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

A polyzebra is a (2,3) leaper. A polyzebra need not be connected in the usual edge-connected sense.

LINKS

Table of n, a(n) for n=1..13.

CROSSREFS

Cf. A030444 (polyknights), A093989, A093990, A093991, A093992.

Sequence in context: A202824 A046904 A030444 * A151830 A354693 A112113

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