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A202912
Number of nX4 0..7 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor
1
372, 1194376, 2397172032, 4062408076312, 7102116597811456, 12637286590945269232, 22397115742156661223732, 39623544474309263600520384, 70135184984660134580990756160, 124165374720618520973688261347828
OFFSET
1,1
COMMENTS
Column 4 of A202916
LINKS
EXAMPLE
Some solutions for n=4
..2..6..5..5....7..2..1..3....2..2..0..1....1..7..2..5....3..5..6..7
..5..6..2..7....7..6..2..3....5..0..7..4....1..7..1..5....1..3..0..7
..4..5..2..7....7..2..2..7....5..6..7..7....4..2..0..3....7..3..0..4
..0..0..3..3....1..1..2..7....3..0..3..4....4..0..2..2....7..3..7..7
CROSSREFS
Sequence in context: A299832 A203439 A265235 * A297383 A361344 A248799
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 26 2011
STATUS
approved