A093989 Number of free n-celled polyzebras (or zebra-move-connected polyominoes).

1, 1, 6, 35, 290, 2714, 27524, 291073, 3166124, 35169275, 397047529, 4541672859, 52510998347

Offset

1,3

Comments

A zebra 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.

Wikipedia, Zebra.

Crossrefs

Cf. A093877 (fixed), A093990 (one-sided), A093991, A093992, A030446 (polyknights).

Sequence in context: A167579 A357095 A030446 * A393838 A394196 A357037

Adjacent sequences: A093986 A093987 A093988 * A093990 A093991 A093992

Keyword

nonn,more

Author

Joseph Myers, May 25 2004

Status

approved