A202861 Number of n X n 0..5 arrays with row and column sums one greater than the previous row and column.

6, 30, 2046, 3436102, 147978735402

Offset

1,1

Links

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

Example

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

Crossrefs

Column 5 of A202864.

Sequence in context: A066388 A222718 A200894 * A088256 A136349 A119411

Adjacent sequences: A202858 A202859 A202860 * A202862 A202863 A202864

Keyword

nonn,more

Author

R. H. Hardin, Dec 25 2011

Status

approved