A395880 Number of oriented polyominoes in the {6,6} tessellation of the hyperbolic plane.

1, 1, 3, 19, 118, 931, 7735, 68328, 625230, 5896203, 56902058, 559925062

Offset

1,3

Comments

For oriented polyominoes, chiral pairs are counted as two.

Links

Table of n, a(n) for n=1..12.

Wiki page indexing sequences related to non-euclidean polyforms

Formula

a(n) = P{p,q}(n) (the number of oriented {p,q} polyominoes of size n) is equal to P{p,oo}(n) for n <= q. In this case, P{p,oo} = A221184.

Mathematica

(* Cf. A394862 with p=6 and q=6. *)

Crossrefs

Cf. A221184, A393731, A394862.

Sequence in context: A290477 A321002 A395879 * A395881 A395882 A221184

Adjacent sequences: A395877 A395878 A395879 * A395881 A395882 A395883

Keyword

nonn,more

Author

John Mason, Érika Roldán, and Rosemberg Toalá-Enríquez, May 14 2026

Status

approved