A208010 Number of nX5 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 0 1 1 vertically.

13, 169, 624, 2304, 5952, 15376, 32860, 70225, 132765, 251001, 434868, 753424, 1222144, 1982464, 3053952, 4704561, 6951645, 10272025, 14666080, 20939776, 29048448, 40297104, 54548364, 73839649, 97865677, 129709321, 168784980

Offset: 1

Author

R. H. Hardin Feb 22 2012

Keywords

• nonn

Comments

Column 5 of A208013

Examples

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

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)