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A196476
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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 4,0,3,2,1 for x=0,1,2,3,4
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1
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17, 43, 42, 305, 2351, 38826, 299659, 1231691, 5238322, 26129353, 141788701, 1086218484, 7344638998, 38637965991, 209973350431, 1159411392373, 6436583617125, 39481503993996, 240320932969724, 1381481638118489
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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 4's, every 1 is next to 1 0's, every 2 is next to 2 3's, every 3 is next to 3 2's, every 4 is next to 4 1's
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LINKS
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EXAMPLE
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Some solutions for n=4
..1..1..0..0..0..0..1....1..1..0..1..1..0..0....0..1..1..0..1..1..1
..0..1..1..1..1..1..1....0..1..1..4..1..0..0....0..1..4..1..1..0..0
..0..1..4..1..4..1..0....0..1..4..1..1..0..0....1..1..1..4..1..0..0
..0..1..1..0..1..1..0....0..1..1..0..1..1..1....1..0..0..1..1..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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