A187726 Number of (n+1)X7 binary arrays with no 2X2 subblock commuting with any of its horizontal and vertical 2X2 subblock neighbors

3520, 46003, 641743, 9823368, 148669520, 2287444987, 35118814718, 539993233442, 8301474121906, 127642216451132, 1962496986726439, 30174249793987854, 463939440774903934, 7133234356724529920, 109676111704087494791

Offset

1,1

Comments

Column 6 of A187729

Links

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

Example

Some solutions for 3X7
..1..1..1..0..1..0..1....1..0..1..1..0..1..0....0..0..0..0..1..0..0
..0..0..1..1..1..0..1....0..0..1..1..1..1..1....0..1..0..1..1..1..1
..0..1..1..0..1..1..0....1..1..0..1..0..1..1....0..1..0..1..0..0..1

Crossrefs

Sequence in context: A205278 A185920 A264450 * A267125 A241240 A035897

Adjacent sequences: A187723 A187724 A187725 * A187727 A187728 A187729

Keyword

nonn

Author

R. H. Hardin Mar 13 2011

Status

approved