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A202908
Number of n X n 0..7 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor
0
1, 680, 9509536, 4062408076312, 83625724607330716008, 81642366196089406720417732740
OFFSET
1,2
COMMENTS
Diagonal of A202916
EXAMPLE
Some solutions for n=4
..1..7..2..5....2..5..1..1....5..2..5..1....5..4..6..1....2..7..7..3
..1..7..1..5....4..7..6..2....5..4..5..1....5..3..7..7....5..2..7..0
..4..2..0..3....7..7..4..5....3..3..1..2....7..3..6..1....5..7..6..3
..4..0..2..2....6..0..0..5....4..4..2..2....7..1..3..0....1..7..2..0
CROSSREFS
Sequence in context: A154036 A185765 A206015 * A309245 A118509 A043691
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 26 2011
STATUS
approved