A390197 a(n) is the number of n-celled polyominoes with holes in the {4,5} tessellation of the hyperbolic plane.

0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 9, 107, 928, 7426, 54199, 375332

Offset

1,11

Comments

This sequence was calculated in the context of a project in collaboration with Érika Roldán, and Rosemberg Toalá-Enríquez.

Links

Table of n, a(n) for n=1..16.

Crossrefs

Cf. A119611, A001419.

Sequence in context: A367789 A316145 A365032 * A039619 A374071 A249048

Adjacent sequences: A390194 A390195 A390196 * A390198 A390199 A390200

Keyword

nonn,more

Author

John Mason, Nov 02 2025

Status

approved