A187727 Number of (n+1)X8 binary arrays with no 2X2 subblock commuting with any of its horizontal and vertical 2X2 subblock neighbors

10558, 186672, 3588249, 76931991, 1628541369, 35118814718, 755272970945, 16272953514081, 350521453843471, 7551605957045594, 162681410006587121, 3504701107120896836, 75502389868040885049, 1626562602643478820132

Offset

1,1

Comments

Column 7 of A187729

Links

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

Example

Some solutions for 3X8
..1..1..0..1..1..0..0..0....0..1..1..1..1..1..1..1....1..1..0..1..0..0..1..1
..0..0..0..1..1..0..1..1....1..1..1..0..0..1..1..0....0..1..1..1..1..1..1..1
..0..1..1..0..1..1..0..1....0..0..1..1..1..0..0..0....1..0..1..0..0..1..0..0

Crossrefs

Sequence in context: A292703 A065319 A063060 * A025028 A063063 A183600

Adjacent sequences: A187724 A187725 A187726 * A187728 A187729 A187730

Keyword

nonn

Author

R. H. Hardin Mar 13 2011

Status

approved