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A366340
Number of free (4,3)-polyominoids with n cells, allowing right-angled (or hard) connections only.
3
1, 1, 5, 19, 123, 954, 9324
OFFSET
1,3
COMMENTS
Two cubes sharing a face have a right-angled connection if they do not lie in the same 3-dimensional affine subspace.
Connections that are not right-angled (flat connections) may occur, but the polyominoids considered here must be connected through right-angled connections only.
Also, number of free polysticks in 4 dimensions with right-angled connections.
CROSSREFS
41st and 77th row of A366766.
Sequence in context: A209111 A354863 A328060 * A297389 A228479 A354843
KEYWORD
nonn,hard,more
AUTHOR
STATUS
approved