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A198913
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Number of n X 7 0..7 arrays with values 0..7 introduced in row major order and no element equal to any horizontal or vertical neighbor.
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2
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203, 10856948, 3352514013159, 1243368053336112649, 467181941240736711604077, 175702802690666247458883923440, 66084692925071529966599521403836686, 24855655340700384655492554800723374323095, 9348667576846602621032033514210811069676125541
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OFFSET
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1,1
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LINKS
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EXAMPLE
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Some solutions with values 0 to 7 for n=3
..0..1..0..2..0..1..3....0..1..0..2..3..4..2....0..1..0..2..0..1..3
..1..0..2..0..4..2..5....1..0..2..0..4..5..0....1..0..2..0..4..3..5
..0..1..0..6..7..3..0....0..1..0..4..5..6..7....0..1..0..6..7..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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EXTENSIONS
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STATUS
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approved
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