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A252913
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Number of (n+2)X(1+2) 0..3 arrays with every consecutive three elements in every row having 2 or 3 distinct values, in every column 1 or 2 distinct values, in every diagonal 2 distinct values, and in every antidiagonal 2 distinct values, and new values 0 upwards introduced in row major order
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1
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754, 5125, 35674, 258746, 1877439, 13648650, 99324229, 722975673, 5263920930, 38326917454, 279077519048, 2032098819327, 14796932438244, 107745136076069, 784558827528110, 5712851702777901, 41598809395672383, 302906576301327635
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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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FORMULA
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Empirical recurrence of order 64 (see link above)
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EXAMPLE
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Some solutions for n=2
..0..1..0....0..1..1....0..1..2....0..1..1....0..1..1....0..1..2....0..1..2
..1..1..0....0..0..1....0..2..2....0..0..1....2..2..1....2..0..3....1..0..2
..1..0..1....0..0..2....1..1..2....0..1..2....2..2..0....2..0..2....0..1..2
..1..0..0....0..0..2....1..2..1....2..1..1....2..2..1....3..3..2....1..0..2
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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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