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A184602
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1/4 the number of (n+1) X 8 binary arrays with equal numbers of 2 X 2 subblocks with sums 1 and 3.
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1
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2880, 446426, 89538170, 19597196907, 4461217004146, 1038876920232926, 245608218357699105, 58705095126108291860, 14148602810460027001369, 3432240397744170829576350, 836984055384644047944565034
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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 8:
..0..0..1..1..1..1..0..1....0..0..1..1..0..0..1..0....0..0..0..1..1..0..1..0
..1..0..0..1..0..1..0..1....1..0..0..1..0..1..0..1....0..0..0..0..0..1..1..1
..0..0..0..1..0..0..1..1....1..0..1..1..1..0..1..1....1..1..1..0..0..1..1..1
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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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