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A218240
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Hilltop maps: number of n X 6 binary arrays indicating the locations of corresponding elements not exceeded by any king-move neighbor in a random 0..3 n X 6 array.
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1
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57, 4065, 262017, 16776705, 1073678481, 68715299265, 4397778640641, 281457830657025, 18013301044272297, 1152851258815826049, 73782480049026835329, 4722078690155327132673, 302213034059098425848289
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OFFSET
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1,1
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COMMENTS
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LINKS
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EXAMPLE
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Some solutions for n=3:
..0..0..1..1..0..0....0..0..0..1..1..1....0..0..1..0..1..1....0..1..0..0..0..1
..0..1..0..1..1..1....0..0..0..0..1..1....1..0..0..0..1..1....1..1..1..1..0..0
..1..1..1..0..1..1....1..0..0..0..0..0....0..0..0..0..0..1....0..0..0..0..0..0
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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