A187438 - OEIS

A187438

Number of (n+1)X7 0..2 arrays with no 2X2 subblock commuting with any of its horizontal and vertical 2X2 subblock neighbors

3022484, 3319295436, 3677337022406, 4086873166309438, 4538075433355553643

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Column 6 of A187441

LINKS

EXAMPLE

Some solutions for 3X7

..0..0..0..0..0..1..0....0..0..0..1..1..0..1....0..0..0..0..1..2..2

..0..1..0..1..2..2..0....0..1..0..1..1..0..2....0..1..0..1..2..1..0

..0..0..0..2..1..1..0....0..0..0..0..2..2..0....0..0..0..2..2..0..0

CROSSREFS

KEYWORD

nonn

AUTHOR

STATUS

approved