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A265963
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Number of nX4 integer arrays with each element equal to the number of horizontal, vertical and antidiagonal neighbors less than or equal to itself.
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1
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7, 1491, 5582, 1111758, 74291246, 4880049141, 389508194942, 27699226366664, 2042688438853046, 150861160228667273, 11013390296591173682, 811261309191888128929, 59501169321682017016007, 4370561055048721695182562
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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=3
..0..4..3..1....0..4..1..0....1..3..0..1....1..4..2..2....1..3..1..0
..4..3..0..4....3..2..6..3....0..6..6..3....1..2..6..1....1..6..6..3
..0..4..4..0....3..2..1..1....1..2..1..0....3..3..1..2....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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