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A183576
Half the number of n X n 0..3 arrays with each element equal to either the maximum or the minimum of its horizontal and vertical neighbors
0
0, 14, 814, 240358, 320224986, 1988200387149, 57140106100076100
OFFSET
1,2
COMMENTS
Diagonal of A183584
EXAMPLE
Some solutions with a(1,1)<=1 for 3X3
..0..3..3....0..0..3....1..1..3....1..1..0....1..3..0....1..2..2....1..1..1
..0..3..0....0..3..3....1..1..3....1..0..0....1..3..0....1..1..1....1..1..1
..0..3..0....0..0..3....3..3..3....1..0..0....1..3..0....3..3..3....1..2..2
CROSSREFS
Sequence in context: A042519 A050983 A360612 * A002429 A064345 A269335
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 05 2011
STATUS
approved