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A203720
Number of (n+1)X(n+1) 0..2 arrays with column and row pair sums b(i,j)=a(i,j)+a(i,j-1) and c(i,j)=a(i,j)+a(i-1,j) nondecreasing in column and row directions, respectively
1
32, 480, 6249, 72777, 808455, 9149941, 108633030, 1362582726, 17889577522, 242706969233, 3365618287527, 47365931280277, 673677478328651, 9659756420132067, 139434264644779578, 2024155694575590620
OFFSET
1,1
COMMENTS
Diagonal of A203728
LINKS
EXAMPLE
Some solutions for n=4
..0..1..1..1..0....0..1..0..2..2....1..0..1..0..1....1..2..1..1..1
..2..1..1..1..2....1..1..2..2..2....1..2..1..2..1....2..1..2..2..2
..1..2..2..2..2....2..2..2..2..2....2..1..2..1..2....1..2..2..2..2
..1..2..2..2..2....2..2..2..2..2....1..2..1..2..2....1..2..2..2..2
..2..2..2..2..2....2..2..2..2..2....2..1..2..2..2....1..2..2..2..2
CROSSREFS
Sequence in context: A319307 A022069 A250560 * A306411 A085539 A091364
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 05 2012
STATUS
approved