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A237933
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Number of (n+1)X(3+1) 0..3 arrays with the upper median plus the lower median minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one
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1
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11701, 228866, 4554824, 94068938, 1903243716, 38477471800, 782578367787, 16010421948796, 325182956026994, 6598288132312864, 134297532801921910, 2737952835801723408, 55665392270619900732, 1131238334494469739760
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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=1
..1..1..3..2....3..1..3..1....1..1..1..1....3..3..0..2....3..3..3..0
..2..1..2..3....1..2..2..1....3..0..0..2....1..0..3..2....0..1..1..3
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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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