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A344301
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Minimum number of cells in an n X n grid that need to be painted so that each unpainted cell is orthogonally adjacent to exactly one painted cell.
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2
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1, 2, 3, 4, 8, 12, 15, 16, 24, 28, 35, 36, 48, 54, 63, 64, 77, 88, 96, 100, 117, 130, 140, 144
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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LINKS
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CROSSREFS
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KEYWORD
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nonn,hard,more
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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