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A265591
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Number of 2Xn 0..2*n-1 arrays with upper left zero and lower right 2*n-1 and each element differing from its horizontal and antidiagonal neighbors by a power of two.
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1
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1, 2, 84, 1354, 38791, 905458, 22977880, 517900514, 22987752597, 786599232404, 29092136543507, 913648420769831, 35187548561281832, 1167539263086885624, 39956736928795429167, 1306138963191078431958, 64687399192829411688656
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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=4
..0..2..6..7....0..1..5..4....0..2..6..7....0..2..6..7....0..1..5..3
..6..2..6..7....3..1..5..7....3..4..6..7....0..4..5..7....5..4..5..7
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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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