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

90, 10109, 13948153, 215433191774, 36832573887843946, 71462394089059338306691

Offset

1,1

Comments

Diagonal of A203787

Links

Table of n, a(n) for n=1..6.

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

Adjacent sequences: A203776 A203777 A203778 * A203780 A203781 A203782

Keyword

nonn

Author

R. H. Hardin Jan 05 2012

Status

approved