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A269827
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Number of nX6 0..4 arrays with some element plus some horizontally, diagonally, antidiagonally or vertically adjacent neighbor totalling four exactly once.
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1
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6400, 5145736, 2472983556, 1109236460528, 467693538063508, 190428267451649488, 75641344262475714972, 29473512707098125940768, 11320636579997479605633644, 4297304706560967747684698760
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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
..2..2..4..4..4..4. .1..4..1..3..4..3. .4..2..1..2..3..1. .4..3..2..1..3..4
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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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