A198660 Number of nX6 0..7 arrays with values 0..7 introduced in row major order and each element equal to at least one horizontal or vertical neighbor

6, 3521, 3053286, 6046334324, 17510670291958

Offset

1,1

Comments

Column 6 of A198661

Links

Table of n, a(n) for n=1..5.

Example

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

Crossrefs

Sequence in context: A198706 A198625 A198653 * A048542 A140173 A158663

Adjacent sequences: A198657 A198658 A198659 * A198661 A198662 A198663

Keyword

nonn

Author

R. H. Hardin Oct 28 2011

Status

approved