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A230187
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Number of 4Xn 0..2 arrays x(i,j) with each element horizontally or antidiagonally next to at least one element with value 2-x(i,j)
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1
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0, 129, 1971, 73857, 2432241, 82359177, 2770525761, 93340154655, 3143682463065, 105885454704267, 3566387657985771, 120121801796361177, 4045897974546191799, 136272446957010253599, 4589878342395006746985, 154594591461184687863333
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OFFSET
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1,2
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COMMENTS
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LINKS
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FORMULA
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Empirical recurrence of order 93 (see link above)
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EXAMPLE
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Some solutions for n=3
..2..0..1....2..0..1....2..0..0....1..1..1....2..0..2....2..0..2....1..1..1
..1..1..2....1..1..2....2..2..0....0..2..0....0..2..2....2..2..0....1..0..2
..2..0..2....1..0..2....2..0..0....1..1..0....0..0..2....2..0..0....2..1..1
..2..0..2....2..0..2....2..2..0....1..2..0....2..0..2....2..2..0....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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