A387005 Number of free (d,2)-polyominoids of size n in arbitrary dimension d.

1, 2, 12, 103, 1597, 36716

Offset

1,2

Links

Table of n, a(n) for n=1..6.

Wikipedia, Polyominoid.

Index entries for sequences related to polyominoes.

Crossrefs

Main diagonal of A387003.

Row sums of A387004.

Cf. A005519 (polyominoes), A365565 (polysticks).

Cf. A000105 (2 dimensions), A075679 (3 dimensions), A366334 (4 dimensions).

Sequence in context: A351762 A302357 A052693 * A050621 A326237 A152254

Adjacent sequences: A387002 A387003 A387004 * A387006 A387007 A387008

Keyword

nonn,more

Author

Pontus von Brömssen, Aug 14 2025

Extensions

a(5) from John Mason, Oct 14 2025

a(6) from Pontus von Brömssen, Oct 18 2025

Status

approved