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A203049
Number of n X n 0..5 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor
0
1, 286, 1055370, 78243755382, 168179371998322692, 10124772353743869083346802
OFFSET
1,2
COMMENTS
Diagonal of A203057
EXAMPLE
Some solutions for n=5
..2..1..3..2..5....4..3..1..2..2....0..5..3..1..5....3..5..4..2..1
..3..0..5..4..5....4..5..0..4..5....5..5..1..2..5....3..5..4..3..4
..3..2..5..5..3....4..5..4..5..5....1..0..5..1..5....2..2..2..1..4
..2..2..5..0..2....2..4..4..0..1....2..3..5..5..4....3..5..1..0..2
..2..0..1..2..2....4..4..4..1..0....3..3..4..4..3....3..5..5..1..2
CROSSREFS
Sequence in context: A130433 A140926 A295447 * A306788 A259402 A157997
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 28 2011
STATUS
approved