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A250532
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Number of (n+1)X(4+1) 0..3 arrays with nondecreasing max(x(i,j),x(i,j-1)) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction
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1
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21326, 289035, 3091263, 28135982, 226449945, 1660642705, 11375090117, 73739279943, 459022341499, 2761125746280, 16191268966687, 92865194391622, 523878250294449, 2912236729173199, 16012243734396908, 87174468796623908
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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..1..1....1..0..0..2..2....0..0..0..0..2....0..0..0..2..2
..0..3..1..3..1....0..1..1..3..2....2..2..3..2..1....1..1..3..2..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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