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A184600
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1/4 the number of (n+1) X 6 binary arrays with equal numbers of 2 X 2 subblocks with sums 1 and 3.
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1
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214, 8268, 411825, 22581061, 1291076970, 75369979530, 4461217004146, 266823559411796, 16087490826015621, 976144514798586404, 59534845819156963374, 3646426116234905396563, 224132828382262166503511
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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 3 X 6:
..1..1..1..1..0..0....1..0..1..1..1..1....1..0..1..1..1..1....0..0..1..1..1..1
..1..0..0..0..1..1....0..0..0..1..1..1....0..1..0..1..0..1....1..1..0..0..0..1
..0..0..1..1..0..1....0..0..1..1..1..0....0..0..0..0..1..0....1..0..0..1..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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