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

1,1

Comments

Diagonal of A188523

Links

Table of n, a(n) for n=1..14.

Example

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

Crossrefs

Sequence in context: A233141 A223631 A188500 * A152542 A206877 A206995

Adjacent sequences: A188512 A188513 A188514 * A188516 A188517 A188518

Keyword

nonn

Author

R. H. Hardin Apr 02 2011

Status

approved