A207754 Number of 5Xn 0..1 arrays avoiding 0 0 1 and 0 1 1 horizontally and 0 0 1 and 1 0 0 vertically.

14, 196, 798, 3249, 8778, 23716, 51590, 112225, 213060, 404496, 698964, 1207801, 1947428, 3139984, 4800348, 7338681, 10754730, 15760900, 22315370, 31595641, 43472814, 59814756, 80333058, 107889769, 141927968, 186704896, 241237920

Offset: 1

Author

R. H. Hardin Feb 19 2012

Keywords

• nonn

Comments

Row 5 of A207752

Examples

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