A202684 Number of nX6 0..3 arrays with row sums equal and column sums equal

4, 904, 224764, 39506424, 1901127404, 12092687195284, 98588916749684

Offset

1,1

Comments

Column 6 of A202686

Links

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

Example

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

Crossrefs

Sequence in context: A349077 A188978 A333502 * A332194 A364276 A006030

Adjacent sequences: A202681 A202682 A202683 * A202685 A202686 A202687

Keyword

nonn

Author

R. H. Hardin Dec 22 2011

Status

approved