A229869 Number of n X n 0..5 arrays with corresponding row and column sums equal

6, 216, 143856, 2805425280, 1656812779036416, 30688414550520167402496

Offset

1,1

Comments

Column 5 of A229870

Links

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

Example

Some solutions for n=4
..0..0..3..3....0..3..0..3....0..3..3..0....0..3..3..3....0..0..3..3
..3..0..3..0....3..0..0..0....3..0..0..3....3..0..3..3....3..0..0..3
..1..4..2..5....1..0..2..4....2..1..0..3....2..2..3..2....2..4..3..1
..2..2..4..2....2..0..5..5....1..2..3..0....4..4..0..1....1..2..4..0

Crossrefs

Sequence in context: A109354 A193613 A194503 * A234610 A041623 A292692

Adjacent sequences: A229866 A229867 A229868 * A229870 A229871 A229872

Keyword

nonn

Author

R. H. Hardin, Oct 01 2013

Status

approved