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A265621
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Number of 3 X n 0..3*n-1 arrays with upper left zero and lower right 3*n-1 and each element differing from its horizontal and diagonal neighbors by a power of two.
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1
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3, 45, 5625, 392320, 13534874, 3413887598, 1130198405370, 53578062122213, 13108218265241141, 992125896408438521, 244355616796007755084, 26142858782722268963104, 5253247467346100142679906
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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=3
..0..1..3....0..2..1....0..4..5....0..2..3....0..4..3....0..4..3....0..8..7
..2..4..3....2..4..6....6..4..5....3..4..3....0..4..2....2..4..5....8..4..6
..5..6..8....2..0..8....8..7..8....3..4..8....5..4..8....8..4..8....5..7..8
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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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