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A267398
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Number of 5Xn arrays containing n copies of 0..5-1 with every element equal to or 1 greater than any north, west or northeast neighbors modulo 5 and the upper left element equal to 0.
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0
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1, 2, 5, 12, 36, 135, 626, 3458, 20470, 120191, 684920, 3792099, 20520497, 109765721, 587635957, 3187862930, 17709268921, 101308744651, 596444660998, 3591984102754, 21931980792775, 134579978888614
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OFFSET
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1,2
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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..1..1....0..0..1..2....0..0..0..0....0..1..2..3....0..1..1..2
..1..2..2..2....1..1..2..3....1..1..1..1....1..2..3..4....1..2..2..3
..2..3..3..3....2..2..3..4....2..2..2..2....2..3..4..0....2..3..3..4
..3..4..4..4....3..3..4..0....3..3..3..3....3..4..0..1....3..4..4..0
..4..0..0..0....4..4..0..1....4..4..4..4....4..0..1..2....4..0..0..1
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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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