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A184461
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Half the number of (n+1) X 4 binary arrays with equal numbers of majority one 2 X 2 subblocks and majority zero 2 X 2 subblocks.
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3
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26, 244, 3090, 42874, 616534, 9016218, 133687638, 2002023718, 30215911640, 458822048550, 7001737409868, 107286031628502, 1649589497350886, 25437988001627234, 393268526198504728, 6093317202558667778
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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 4
..0..1..1..1....0..1..1..1....0..0..1..0....0..0..1..1....0..0..1..0
..0..0..0..1....1..0..0..1....1..1..1..0....1..0..1..0....0..1..0..1
..0..1..1..1....1..1..0..0....0..0..0..0....1..1..0..0....1..0..1..1
...
...M..E..P.......E..E..P.......E..P..E.......M..E..P.......M..E..E...
...M..E..P.......P..M..M.......E..E..M.......P..E..M.......E..E..P...
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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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