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A224018
Number of n X n 0..3 arrays with rows nondecreasing and antidiagonals unimodal
0
4, 100, 6796, 772683, 120352359, 23151623729, 5173325036371, 1291969529189675, 351545826740833046, 102423287609988684833, 31560026488902316691503, 10191808855482615567911934, 3425597818181959478072701084
OFFSET
1,1
COMMENTS
Diagonal of A224024
EXAMPLE
Some solutions for n=3
..0..0..1....0..1..1....2..3..3....1..1..1....0..3..3....2..2..3....2..3..3
..1..2..3....1..2..3....3..3..3....0..0..2....1..3..3....1..2..3....1..1..3
..0..2..3....0..0..2....1..1..3....0..2..2....0..1..1....0..2..2....0..1..3
CROSSREFS
Sequence in context: A223981 A224385 A249939 * A198278 A202990 A324096
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 30 2013
STATUS
approved