A395894 Number of oriented polyominoes in the {9,3} tessellation of the hyperbolic plane.

1, 1, 4, 31, 242, 2391, 24242, 260266

Offset

1,3

Comments

For oriented polyominoes, chiral pairs are counted as two.

Links

Table of n, a(n) for n=1..8.

Wiki page indexing sequences related to non-euclidean polyforms

Crossrefs

Cf. A393745.

Sequence in context: A136284 A183911 A039765 * A001091 A309184 A077615

Adjacent sequences: A395891 A395892 A395893 * A395895 A395896 A395897

Keyword

nonn,more

Author

John Mason, Érika Roldán, and Rosemberg Toalá-Enríquez, May 18 2026

Status

approved