A395886 Number of oriented polyominoes in the {7,6} tessellation of the hyperbolic plane.

1, 1, 3, 26, 203, 1989, 20228, 218842, 2449879, 28268951, 333924352, 4022968327

Offset

1,3

Comments

For oriented polyominoes, chiral pairs are counted as two.

Links

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

Index entries for 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} = A389561.

Mathematica

(* Cf. A394862 with p=7 and q=6. *)

Crossrefs

Cf. A389561, A393736, A394862.

Sequence in context: A228116 A091123 A395885 * A395887 A395888 A389561

Adjacent sequences: A395883 A395884 A395885 * A395887 A395888 A395889

Keyword

nonn,more

Author

John Mason, Érika Roldán, and Rosemberg Toalá-Enríquez, May 16 2026

Status

approved