A203893 Number of (n+1)X6 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.

940270, 1905833494, 9042090593477, 36337203300044690, 116191919935256968675, 304473777397661322628561, 675997322694333574295767738

Offset

1,1

Comments

Column 5 of A203896

Links

Table of n, a(n) for n=1..7.

Example

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

Crossrefs

Sequence in context: A205614 A198780 A104940 * A345640 A346353 A203823

Adjacent sequences: A203890 A203891 A203892 * A203894 A203895 A203896

Keyword

nonn

Author

R. H. Hardin, Jan 07 2012

Status

approved