A188515 Number of n X n binary arrays without the pattern 1 1 0 diagonally, vertically or horizontally.

2, 16, 229, 6760, 342240, 32470385, 5593606875, 1811059364020, 1103649329789000, 1283030748540574429, 2858394905740312536937, 12271770983630246007920447, 101822638806356395388304091003, 1636793382556126237888634491914956

Offset: 1

Author

R. H. Hardin Apr 02 2011

Keywords

• nonn

Comments

Diagonal of A188523

Examples

			Some solutions for 3X3
..0..1..0....0..0..1....1..1..1....0..0..0....0..0..0....1..0..1....1..1..1
..1..1..1....0..1..0....0..0..1....0..0..0....0..0..0....0..1..0....0..0..1
..0..1..1....1..0..1....0..0..1....0..0..1....0..1..1....1..1..1....1..0..1