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A269096
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Number of nX7 0..3 arrays with some element plus some horizontally or vertically adjacent neighbor totalling three exactly once.
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1
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5832, 7375872, 5795398368, 3892946216856, 2416707037884480, 1430390977786967280, 819944297332124826720, 459338963193935894366016, 252910225839761737259917296, 137383600294764153686560207128
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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=1
..0..3..2..2..0..0..1. .1..1..0..3..1..1..1. .0..1..3..1..0..3..3
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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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