A198657 Number of nX3 0..7 arrays with values 0..7 introduced in row major order and each element equal to at least one horizontal or vertical neighbor

1, 14, 185, 3904, 98467, 3053286, 109133049, 4460603630, 202661109307, 10057569576034, 533251017131222, 29684104738808241, 1708995821028336330, 100671800330158890680, 6020806089426293935506, 363687165160204642974491

Offset

1,2

Comments

Column 3 of A198661

Links

R. H. Hardin, Table of n, a(n) for n = 1..138

Example

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

Crossrefs

Sequence in context: A198703 A198622 A198650 * A055759 A368702 A368536

Adjacent sequences: A198654 A198655 A198656 * A198658 A198659 A198660

Keyword

nonn

Author

R. H. Hardin Oct 28 2011

Status

approved