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A265596
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Number of nX3 0..n*3-1 arrays with upper left zero and lower right n*3-1 and each element differing from its horizontal, vertical and antidiagonal neighbors by a power of two.
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1
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1, 4, 0, 177, 2228, 0, 534268, 1808623, 0, 221771015, 9350721457, 0, 1164230050591, 8981789416609, 0, 1113779465888434, 35768924074919695, 0, 6116073611940463518, 38407633854606693981, 0, 8985586499215136905778
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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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EXAMPLE
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Some solutions for n=5
..0..2..1....0..2.10....0..8..7....0..8.10....0..2..1....0..2..4....0..8..4
..4..3..5....4..6..2....4..6..8....4.12.11....4..0..2....4..0..8....4..0..8
..5..7..6....8.10..6....8.10..9....8.10.12....8..4..6....2..4.12....8..4..6
..6..8.10...12.14.10....6..8.10...12..8.10....6..8.10....0..8.10...12..8.10
..4.12.14...10..6.14....7..6.14...10..6.14...10.12.14....4..6.14....4..6.14
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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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