A203100 Number of n X 7 0..3 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor.

1268, 20174774, 163621176194, 1186165852092876, 8968410661761080882, 68145439667266350435686, 516228209623915573866603862, 3910082447672696425090538622374, 29622112490764323854670076610636942

Offset: 1

Author

R. H. Hardin, Dec 29 2011

Keywords

• nonn

Comments

Column 7 of A203101.

Examples

			Some solutions for n=5
..2..2..3..0..2..3..3....2..2..0..1..1..2..3....2..1..1..2..3..1..0
..3..0..3..0..2..3..1....2..0..3..2..3..1..3....2..0..0..2..3..1..2
..3..0..1..3..2..0..1....1..3..3..2..3..2..3....3..0..3..3..1..2..2
..3..0..2..3..2..1..0....2..3..1..2..2..2..1....3..2..3..2..2..0..1
..3..3..0..3..1..2..2....0..2..2..2..0..0..0....1..0..3..0..3..3..3
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..55

Crossrefs

Cf. A203101.