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A206385
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Number of nX4 0..6 arrays with no element equal to another within a city block distance of two, and new values 0..6 introduced in row major order
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1
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2, 33, 1368, 67716, 3328979, 164270604, 8094257014, 399073153303, 19671060879306, 969710249315342, 47801400299066037, 2356379708874988482, 116157573684573753928, 5725991875022057193833, 282262740672653624738188
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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=4
..0..1..2..0....0..1..2..3....0..1..2..3....0..1..2..3....0..1..2..0
..2..3..4..5....3..4..5..6....2..3..4..5....2..3..4..5....2..3..4..5
..1..5..6..3....6..2..0..1....1..5..6..0....4..5..0..6....5..6..0..1
..0..2..1..4....0..1..3..2....3..4..1..2....6..1..3..4....4..1..5..6
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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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