A202713 Number of n X n 0..3 arrays with row sums equal and no column sum equal to the previous

4, 28, 4740, 7788648, 189412482924

Offset

1,1

Comments

Column 3 of A202714

Links

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

Example

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

Crossrefs

Sequence in context: A000838 A218174 A220756 * A129290 A307553 A327436

Adjacent sequences: A202710 A202711 A202712 * A202714 A202715 A202716

Keyword

nonn

Author

R. H. Hardin Dec 23 2011

Status

approved