A202685 Number of nX7 0..3 arrays with row sums equal and column sums equal

4, 788, 496276, 235092820, 143872363604, 98588916749684

Offset

1,1

Comments

Column 7 of A202686

Links

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

Example

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

Crossrefs

Sequence in context: A102195 A114766 A239623 * A172893 A072725 A349067

Adjacent sequences: A202682 A202683 A202684 * A202686 A202687 A202688

Keyword

nonn

Author

R. H. Hardin Dec 22 2011

Status

approved