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A237002
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Number of (n+1)X(3+1) 0..3 arrays with the upper median plus the lower median of every 2X2 subblock equal
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1
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5288, 79164, 1150036, 22056220, 411646536, 8124638140, 158569999540, 3140246502408, 61933486884504, 1227200207914348, 24281736510050872, 481242897954184144, 9533140821129343856, 188962382433686427052
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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=2
..1..1..1..1....0..3..0..3....0..2..1..2....0..1..1..0....1..1..1..1
..2..0..1..3....1..1..1..1....3..1..3..0....3..2..2..2....1..0..2..1
..0..3..1..0....1..3..1..2....0..2..0..3....0..1..0..1....1..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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