A203401 Number of (n+2)X(n+2) binary arrays avoiding patterns 000 and 111 in rows and columns.

102, 2030, 60232, 3858082, 446672706, 101578277384, 43680343039806, 36133311325799774, 57061338836892846628, 172603583392706027305210

Offset: 1

Author

R. H. Hardin Jan 01 2012

Keywords

• nonn

Comments

Diagonal of A203407

Examples

			Some solutions for n=3
..1..0..1..0..0....0..1..0..1..0....1..0..0..1..0....1..0..0..1..0
..1..0..0..1..0....0..0..1..0..0....0..0..1..0..0....0..1..1..0..1
..0..1..1..0..1....1..1..0..1..1....1..1..0..1..1....1..0..1..0..1
..1..0..1..0..0....0..0..1..0..0....0..1..1..0..0....0..1..0..1..0
..0..1..0..1..0....1..0..1..1..0....0..0..1..0..1....1..0..1..1..0