A208107 Number of nX7 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 1 1 and 1 1 0 vertically.

40, 1600, 6016, 25555, 134160, 768544, 4747545, 30461016, 200679160, 1341923275, 9060096280, 61521142072, 419255546841, 2863417898992, 19583147331312, 134042927712195, 917974509748384, 6288633342628816, 43089144637765369

Offset: 1

Author

R. H. Hardin Feb 23 2012

Keywords

• nonn

Comments

Column 7 of A208108

Examples

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

Links

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

Formula

Empirical: a(n) = 11*a(n-1) -17*a(n-2) -124*a(n-3) +276*a(n-4) +396*a(n-5) -902*a(n-6) -462*a(n-7) +946*a(n-8) +220*a(n-9) -340*a(n-10) -44*a(n-11) +39*a(n-12) +3*a(n-13) -a(n-14) for n>15