A198981 Number of nX7 0..5 arrays with values 0..5 introduced in row major order and no element equal to any horizontal or vertical neighbor.

202, 3603244, 98102456246, 2692353648978984, 73900197917712351603, 2028430770889558380053172, 55676868201599759013090066735, 1528232414884966866457407229662199

Offset: 1

Author

R. H. Hardin Nov 01 2011

Keywords

• nonn

Comments

Column 7 of A198982

Examples

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