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A224256
Number of n X n 0..2 arrays with rows and antidiagonals unimodal and columns nondecreasing
0
3, 36, 648, 12467, 238366, 4480391, 83124099, 1530419762, 28072690614, 514262753781, 9420094252771
OFFSET
1,1
COMMENTS
Diagonal of A224262
EXAMPLE
Some solutions for n=3
..0..2..0....0..1..0....0..0..0....1..1..0....1..2..0....2..1..1....0..1..0
..0..2..0....0..1..0....2..0..0....2..2..1....2..2..0....2..2..2....2..2..2
..0..2..0....1..1..2....2..1..0....2..2..2....2..2..0....2..2..2....2..2..2
CROSSREFS
Sequence in context: A305991 A203493 A296098 * A223912 A224184 A241996
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 02 2013
STATUS
approved