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A202858
Number of n X n 0..2 arrays with row and column sums one greater than the previous row and column.
0
3, 6, 42, 1346, 223456, 202999208, 1049899768685
OFFSET
1,1
EXAMPLE
Some solutions for n=4
..0..0..1..2....0..0..1..1....0..0..2..1....0..1..0..1....0..0..0..2
..0..1..2..1....0..1..2..0....0..1..2..1....1..1..1..0....0..0..2..1
..1..2..1..1....2..0..0..2....1..2..0..2....0..0..2..2....2..2..0..0
..2..1..1..2....0..2..1..2....2..1..1..2....1..1..1..2....0..1..2..2
CROSSREFS
Column 2 of A202864.
Sequence in context: A125889 A300599 A002028 * A116315 A363475 A001886
KEYWORD
nonn,more
AUTHOR
R. H. Hardin, Dec 25 2011
STATUS
approved