A395888 Number of oriented polyominoes in the {7,8} tessellation of the hyperbolic plane.

1, 1, 3, 26, 203, 1989, 20254, 219388, 2459694, 28430925, 336472173, 4061865648, 49856682527, 620728583489

Offset

1,3

Comments

For oriented polyominoes, chiral pairs are counted as two.

Links

Table of n, a(n) for n=1..14.

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=8. *)

Crossrefs

Cf. A389561, A393738, A394862.

Sequence in context: A395885 A395886 A395887 * A389561 A037790 A037671

Adjacent sequences: A395885 A395886 A395887 * A395889 A395890 A395891

Keyword

nonn,more

Author

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

Status

approved