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A252902
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Number of (n+2)X(4+2) 0..3 arrays with every consecutive three elements in every row and column having exactly two distinct values, and new values 0 upwards introduced in row major order
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1
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139968, 3255537, 66702186, 1470299799, 31496378270, 686625400736, 14835814827267, 322576038239193, 6989657828455183, 151771815886853461, 3292236549500324844, 71456089714340948727, 1550469560563259849691
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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=1
..0..1..1..2..1..1....0..0..1..1..2..1....0..1..1..2..2..0....0..1..1..0..0..2
..0..1..1..0..1..1....0..3..0..3..3..0....1..2..1..1..2..1....3..0..0..1..1..0
..2..3..2..2..3..2....3..3..1..1..3..1....1..1..0..1..0..0....0..0..1..0..1..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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