A390198 a(n) is the number of n-celled snake polyominoes with holes in the {4,5} tessellation of the hyperbolic plane.

0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 7, 22, 75, 239, 762, 2385, 7441

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..18.

Crossrefs

Cf. A119611, A390196, A390197.

Sequence in context: A137398 A151439 A204218 * A007141 A278151 A387063

Adjacent sequences: A390195 A390196 A390197 * A390199 A390200 A390201

Keyword

nonn,more

Author

John Mason, Nov 02 2025

Status

approved