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A224650
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Number of (n+2) X 9 0..1 matrices with each 3 X 3 subblock having the same population.
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0
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175616, 209216, 250304, 303488, 430208, 630080, 983168, 1890368, 3876992, 8594432, 21633920, 56280896, 151174016, 425070656, 1208783744, 3475570688, 10157902208, 29817258560, 87902960768, 260802882368
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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..1..0..0..1..0..1..1..0....0..0..1..1..1..0..1..0..0
..1..0..1..1..0..0..0..0..0....1..1..0..0..0..0..0..0..0
..1..0..0..1..0..1..1..0..1....0..0..0..0..0..1..0..1..1
..0..0..1..0..0..1..1..0..1....0..0..1..1..1..0..1..0..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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