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A203779 Number of (n+1)X(n+1) 0..3 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) such that rows of b(i,j) and columns of c(i,j) are lexicographically nondecreasing 0
90, 10109, 13948153, 215433191774, 36832573887843946, 71462394089059338306691 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Diagonal of A203787
LINKS
EXAMPLE
Some solutions for n=4
..1..0..2..1..0....2..3..2..2..2....1..2..0..0..3....3..0..1..0..0
..0..3..1..2..3....3..2..3..3..3....2..1..3..3..2....0..3..2..3..3
..3..1..3..2..1....2..3..3..3..3....2..3..2..2..3....1..2..3..3..3
..3..2..1..2..3....3..3..2..3..3....3..2..3..3..2....3..3..3..0..2
..3..3..3..2..3....3..3..2..3..3....2..3..3..3..2....3..3..3..3..1
CROSSREFS
Sequence in context: A116273 A036257 A276352 * A359842 A295594 A200503
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 05 2012
STATUS
approved

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Last modified May 25 04:52 EDT 2024. Contains 372782 sequences. (Running on oeis4.)