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A367440
Independence number of the polyomino graph PG(n) defined in A367435.
4
1, 1, 1, 2, 4, 7, 18, 46
OFFSET
1,4
COMMENTS
Maximum size of a set of free polyominoes with n cells such that no polyomino in the set can be obtained from another by moving one of its cells, where the intermediate (the set of cells remaining when the cell to be moved is detached) is required to be a (connected) polyomino.
FORMULA
a(n) >= A367127(n).
CROSSREFS
KEYWORD
nonn,more
AUTHOR
STATUS
approved