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A236038
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Number of (n+1)X(2+1) 0..3 arrays colored with the difference of the upper median and the lower median in each 2X2 subblock
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1
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2404, 42264, 722548, 12435076, 215833320, 3742165712, 64753334132, 1120625605524, 19402307063528, 335925911180296, 5815540423521376, 100678169726567032, 1742970553687774724, 30174878799319673848
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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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FORMULA
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Empirical recurrence of order 87 (see link above)
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EXAMPLE
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Some solutions for n=2
..0..1..1....3..0..1....3..3..2....0..2..3....3..0..2....2..0..3....0..3..2
..2..3..3....0..2..0....1..3..0....2..0..2....0..3..3....2..2..3....3..1..1
..2..2..0....2..1..1....2..1..1....2..3..1....1..1..0....0..1..2....2..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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