A198720 Number of nX5 0..6 arrays with values 0..6 introduced in row major order and no element equal to any horizontal or vertical neighbor.

15, 10507, 34003792, 141168480719, 601755060211186, 2572072097029554676, 10996875674843226590993, 47018449018254334323435148, 201033586140960282012089201427, 859545914195473034723104861028749

Offset: 1

Author

R. H. Hardin Oct 29 2011

Keywords

• nonn

Comments

Column 5 of A198723

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..52