A202097 Number of (n+2)X7 binary arrays avoiding patterns 001 and 011 in rows and columns.

3000, 22500, 105000, 490000, 1715000, 6002500, 17287200, 49787136, 124467840, 311169600, 698544000, 1568160000, 3234330000, 6670805625, 12847477500, 24743290000, 45032787800, 81959673796, 142244061960, 246869859600

Offset: 1

Author

R. H. Hardin Dec 11 2011

Keywords

• nonn

Comments

Column 5 of A202100

Examples

			Some solutions for n=2
..1..1..1..1..0..0..0....1..1..1..1..0..0..0....1..1..1..1..1..1..1
..1..1..0..1..0..1..0....1..1..1..1..1..0..0....1..1..0..1..0..1..0
..0..1..0..1..0..0..0....1..1..1..1..0..0..0....1..0..1..0..1..0..1
..1..0..0..0..0..0..0....1..1..0..0..0..0..0....1..1..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) +12*a(n-2) -26*a(n-3) -65*a(n-4) +156*a(n-5) +208*a(n-6) -572*a(n-7) -429*a(n-8) +1430*a(n-9) +572*a(n-10) -2574*a(n-11) -429*a(n-12) +3432*a(n-13) -3432*a(n-15) +429*a(n-16) +2574*a(n-17) -572*a(n-18) -1430*a(n-19) +429*a(n-20) +572*a(n-21) -208*a(n-22) -156*a(n-23) +65*a(n-24) +26*a(n-25) -12*a(n-26) -2*a(n-27) +a(n-28)