A184204 Number of (n+1)X7 binary arrays with no 2X2 subblock containing fewer than two 1s.

3268, 158648, 6468501, 281420718, 12021784217, 516844071813, 22178227663588, 952294826074262, 40881902344878662, 1755168245685353119, 75352500961047758574, 3235038360513128954137, 138886585051318322739473

Offset: 1

Author

R. H. Hardin Jan 10 2011

Keywords

• nonn

Comments

Column 6 of A184207

Examples

			Some solutions for 3X7
..0..1..1..1..1..0..0....0..1..1..1..0..0..1....1..0..1..1..0..0..1
..1..1..1..0..1..1..1....1..1..0..0..1..1..0....1..1..1..0..1..1..0
..0..0..1..0..1..0..0....0..0..1..1..1..1..0....1..1..1..1..1..1..1
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..200