A189774 Number of n X 4 binary arrays without the pattern 1 0 0 1 diagonally, vertically or horizontally.

15, 225, 3375, 37976, 418550, 4461435, 48633913, 530389481, 5817065520, 63680392402, 697353409375, 7631111846379, 83521134087527, 914046929969572, 10004056595349672, 109490279695417318, 1198342710234669673

Offset: 1

Author

R. H. Hardin Apr 27 2011

Keywords

• nonn

Comments

Column 4 of A189779.

Examples

			Some solutions for 5 X 4
..0..0..0..0....0..0..0..0....0..0..0..1....0..0..0..1....0..0..1..0
..0..1..0..1....1..1..1..1....0..0..0..1....1..1..0..0....1..0..1..0
..0..0..0..1....0..1..0..1....0..0..0..1....0..1..1..0....1..0..1..0
..1..1..0..0....0..0..1..1....0..1..0..1....1..1..1..0....0..0..1..0
..0..1..0..1....0..1..1..1....0..1..0..0....1..0..0..0....0..1..0..1
		

Links

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

Crossrefs

Cf. A189779.