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A196313
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Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,0,4,1,3 for x=0,1,2,3,4
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1
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17, 123, 728, 13277, 132202, 1194982, 11575179, 157085533, 1846682222, 18830197948, 204138811128, 2267817750300, 25185129693320, 280519702209453, 3182410412743494, 35203253665728279, 385376356755364192
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OFFSET
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1,1
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COMMENTS
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Every 0 is next to 0 2's, every 1 is next to 1 0's, every 2 is next to 2 4's, every 3 is next to 3 1's, every 4 is next to 4 3's
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LINKS
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EXAMPLE
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Some solutions for n=4
..0..0..1..1..1..1..0....0..1..3..1..3..1..0....1..1..0..0..0..0..0
..1..1..1..0..0..3..1....0..1..1..0..1..1..1....0..3..1..1..3..1..1
..1..1..1..3..1..1..3....0..1..3..1..3..0..1....0..1..1..1..1..1..1
..0..0..0..1..1..0..1....1..1..0..1..1..0..1....1..1..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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