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

1,1

Comments

Column 5 of A198661

Links

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

Example

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

Crossrefs

Sequence in context: A198705 A198624 A198652 * A142801 A057632 A245245

Adjacent sequences: A198656 A198657 A198658 * A198660 A198661 A198662

Keyword

nonn

Author

R. H. Hardin Oct 28 2011

Status

approved