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A366334
Number of free (4,2)-polyominoids with n cells.
5
1, 2, 12, 95, 1267, 22349
OFFSET
1,2
COMMENTS
A (D,d)-polyominoid is a connected set of d-dimensional unit cubes with integer coordinates in D-dimensional space, where two cubes are connected if they share a (d-1)-dimensional facet. For example, (3,2)-polyominoids are normal polyominoids (A075679), (D,D)-polyominoids are D-dimensional polyominoes (A000105, A038119, A068870, ...), and (D,1)-polyominoids are polysticks in D dimensions (A019988, A365559, A365561, ...).
CROSSREFS
46th row of A366766.
Cf. A366335 (fixed).
Free (D,d)-polyominoids:
D\d| 1 2 3 4
---+--------------------------------
1 | A000012
Sequence in context: A372202 A359692 A321057 * A247075 A239837 A239838
KEYWORD
nonn,hard,more
AUTHOR
STATUS
approved