A187725 Number of (n+1)X6 binary arrays with no 2X2 subblock commuting with any of its horizontal and vertical 2X2 subblock neighbors

1173, 11324, 114633, 1252304, 13555195, 148669520, 1628541369, 17862966996, 195900562382, 2148718629188, 23567125294297, 258490212189234, 2835170496330003, 31096710213148897, 341075340251648749

Offset

1,1

Comments

Column 5 of A187729

Links

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

Example

Some solutions for 3X6
..1..0..1..1..0..0....0..0..1..0..0..0....0..0..0..0..0..1....0..1..0..1..1..0
..1..1..0..1..1..1....0..1..1..0..1..1....1..1..0..1..0..1....1..1..1..0..0..0
..1..1..0..1..1..0....0..0..0..0..0..0....0..0..0..0..0..0....0..1..1..0..1..0

Crossrefs

Sequence in context: A303107 A302958 A232082 * A269958 A033912 A204763

Adjacent sequences: A187722 A187723 A187724 * A187726 A187727 A187728

Keyword

nonn

Author

R. H. Hardin Mar 13 2011

Status

approved