A208011 Number of nX6 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 0 1 1 vertically.

19, 361, 1482, 6084, 16224, 43264, 92560, 198025, 369795, 690561, 1175034, 1999396, 3178672, 5053504, 7627464, 11512449, 16676595, 24157225, 33844690, 47416996, 64618224, 88059456, 117234312, 156075049, 203673379, 265787809, 340895730

Offset: 1

Author

R. H. Hardin Feb 22 2012

Keywords

• nonn

Comments

Column 6 of A208013

Examples

			Some solutions for n=4
..1..1..1..1..0..0....0..0..1..0..0..1....1..0..0..1..0..0....1..0..0..1..0..0
..0..1..1..1..1..1....0..0..1..1..1..1....0..0..1..1..1..1....0..1..1..0..0..1
..1..0..0..1..0..0....0..0..1..0..0..1....1..0..0..1..0..0....1..0..0..1..0..0
..0..1..0..0..1..0....0..0..1..0..0..1....0..0..1..0..0..1....0..0..1..0..0..1
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210

Formula

Empirical: a(n) = 2*a(n-1) +6*a(n-2) -14*a(n-3) -14*a(n-4) +42*a(n-5) +14*a(n-6) -70*a(n-7) +70*a(n-9) -14*a(n-10) -42*a(n-11) +14*a(n-12) +14*a(n-13) -6*a(n-14) -2*a(n-15) +a(n-16)