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A252884
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Number of (2+2)X(n+2) 0..2 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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3102, 25227, 206314, 1723377, 14424475, 120914908, 1013935410, 8505529697, 71356949001, 598708221110, 5023496674281, 42151375927194, 353688236912557, 2967792166328957, 24902779030429194, 208960087817293157
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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=2
..0..1..2..0....0..0..1..1....0..1..0..1....0..1..1..0....0..1..2..1
..2..0..2..1....2..1..0..2....1..0..2..2....0..1..1..2....1..2..0..1
..2..0..2..1....2..1..1..2....1..1..2..2....2..1..0..2....0..1..0..1
..0..2..2..0....1..2..1..0....2..0..2..2....2..0..0..1....1..1..2..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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