A203894 Number of (n+1)X7 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

6287755, 40229386532, 909510089895106, 18604524788467098072, 304473777397661322628561

Offset

1,1

Comments

Column 6 of A203896

Links

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

Example

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

Crossrefs

Sequence in context: A204654 A138941 A251379 * A152070 A147531 A018895

Adjacent sequences: A203891 A203892 A203893 * A203895 A203896 A203897

Keyword

nonn

Author

R. H. Hardin Jan 07 2012

Status

approved