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A218194
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Hilltop maps: number of nX6 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or vertical neighbor in a random 0..3 nX6 array
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1
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57, 4001, 260205, 16703113, 1068969245, 68410191725, 4378092248621, 280189181606213, 17931584186079329, 1147588053510298689, 73443503055457761265, 4700247703823958214433, 300807117566919214489057
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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..0..1..0..1....0..1..1..1..0..1....0..0..1..1..1..1....0..1..1..0..1..1
..1..0..1..0..0..1....0..0..0..0..1..0....1..1..1..1..0..1....1..1..0..0..0..1
..1..0..1..0..0..1....1..0..1..0..1..0....0..1..0..1..0..0....0..0..1..0..1..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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