A202095 Number of (n+2)X5 binary arrays avoiding patterns 001 and 011 in rows and columns.

720, 3600, 12000, 40000, 105000, 275625, 617400, 1382976, 2765952, 5531904, 10160640, 18662400, 32076000, 55130625, 89842500, 146410000, 228399600, 356303376, 535927392, 806105664, 1175570760, 1714374025, 2434614000

Offset: 1

Author

R. H. Hardin Dec 11 2011

Keywords

• nonn

Comments

Column 3 of A202100

Examples

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

Links

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

Formula

Empirical: a(n) = 2*a(n-1) +8*a(n-2) -18*a(n-3) -27*a(n-4) +72*a(n-5) +48*a(n-6) -168*a(n-7) -42*a(n-8) +252*a(n-9) -252*a(n-11) +42*a(n-12) +168*a(n-13) -48*a(n-14) -72*a(n-15) +27*a(n-16) +18*a(n-17) -8*a(n-18) -2*a(n-19) +a(n-20)