A203888 Number of (n+1)X(n+1) 0..4 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

205, 72423, 499486878, 58500223468696, 116191919935256968675

Offset

1,1

Comments

Diagonal of A203896

Links

Table of n, a(n) for n=1..5.

Example

Some solutions for n=4
..0..2..3..1..3....1..0..4..1..3....1..0..3..4..0....1..4..4..3..3
..4..3..2..4..3....3..4..1..4..2....0..2..0..0..4....3..3..3..4..4
..4..3..4..4..0....3..4..3..0..2....3..1..4..3..2....4..2..4..4..4
..4..3..4..4..1....4..4..0..3..2....0..4..2..2..2....2..4..3..3..3
..3..4..4..3..1....4..4..2..0..3....3..2..3..1..4....4..3..4..1..1

Crossrefs

Sequence in context: A203862 A289333 A015289 * A188447 A252278 A252271

Adjacent sequences: A203885 A203886 A203887 * A203889 A203890 A203891

Keyword

nonn

Author

R. H. Hardin Jan 07 2012

Status

approved