A198659 Number of nX5 0..7 arrays with values 0..7 introduced in row major order and each element equal to at least one horizontal or vertical neighbor.

3, 488, 98467, 40065880, 22693251873, 17510670291958

Offset: 1

Author

R. H. Hardin Oct 28 2011

Keywords

• nonn

Comments

Column 5 of A198661

Examples

			Some solutions with all values 0 to 7 for n=4
..0..1..1..1..2....0..1..1..2..3....0..1..1..2..2....0..1..2..3..4
..0..2..3..4..2....0..4..1..2..3....0..3..3..2..0....0..1..2..3..4
..2..2..3..4..5....4..4..5..6..7....4..5..6..6..0....5..6..7..7..4
..6..6..7..7..5....2..2..5..6..7....4..5..5..7..7....5..6..7..3..3