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A180998
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Number of (n+1)xn binary matrices with rows and columns each in strictly increasing order as binary numbers and no 1 neighboring another 1
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2
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1, 1, 2, 5, 21, 124, 1145, 15521, 320688, 9876633, 459462273, 32032593512, 3362495995045, 529976350066025, 125628977242518536, 44744362871512206777, 23958150449772962130381, 19279048205688770346279728
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OFFSET
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1,3
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COMMENTS
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LINKS
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EXAMPLE
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All solutions for 5X4
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
..0..0..0..1....0..0..0..1....0..0..0..1....0..0..0..1....0..0..0..1
..0..0..1..0....0..0..1..0....0..0..1..0....0..0..1..0....0..0..1..0
..0..1..0..0....0..1..0..0....0..1..0..0....0..1..0..1....0..1..0..1
..1..0..0..0....1..0..1..0....1..0..0..1....1..0..0..0....1..0..1..0
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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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