A393745 Number of free polyominoes in the {9,3} tessellation of the hyperbolic plane.

1, 1, 4, 19, 136, 1226, 12259, 130435, 1441755, 16390245

Offset

1,3

Links

Table of n, a(n) for n=1..10.

Crossrefs

Cf. A259354.

Sequence in context: A220066 A157303 A007788 * A259354 A385420 A215851

Adjacent sequences: A393742 A393743 A393744 * A393746 A393747 A393748

Keyword

nonn,more

Author

John Mason, Érika Roldán, and Rosemberg Toalá-Enríquez, Feb 27 2026

Status

approved