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A224804
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Number of (n+2)X4 0..3 matrices with each 3X3 subblock having the same population
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1
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1048576, 2867200, 8151040, 25056256, 100235776, 417335296, 1816453120, 9114142720, 46167923200, 236010496000, 1298135718400, 7150045665280, 39434706558976, 226326503372800, 1299176162060800, 7458911618492416
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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=2
..0..0..0..0....0..0..2..0....0..0..0..0....0..0..2..2....0..0..2..0
..2..0..3..2....0..2..2..1....2..2..1..2....1..2..0..0....3..2..2..3
..1..3..0..1....1..2..2..0....0..0..2..0....2..2..3..1....1..2..0..1
..0..0..0..0....0..0..2..0....0..0..0..0....0..2..0..2....0..0..2..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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