A204704 Number of nX7 0..2 arrays with no occurrence of three equal elements in a row horizontally, vertically or nw-to-se diagonally, and new values 0..2 introduced in row major order.

224, 301056, 91733605, 38585324821, 15521787839696, 6319625580942184, 2568926644225402978, 1044792211767082026764, 424880469013125627760792, 172792044105478879279518350, 70270849522277745874734015748

Offset: 1

Author

R. H. Hardin Jan 18 2012

Keywords

• nonn

Comments

Column 7 of A204705

Examples

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