A187437 Number of (n+1)X6 0..2 arrays with no 2X2 subblock commuting with any of its horizontal and vertical 2X2 subblock neighbors.

365485, 150878368, 62735788524, 26149356865336, 10892264636400698, 4538075433355553643, 1890619227290921101120, 787665007015732116012615, 328154178211463733692477790, 136714491883321598821583125411

Offset

1,1

Comments

Column 5 of A187441

Links

R. H. Hardin, Table of n, a(n) for n = 1..13

Example

Some solutions for 3X6
..0..0..2..0..1..2....0..0..2..2..0..1....0..0..2..0..0..0....0..0..1..0..2..0
..0..1..1..1..1..2....0..1..2..1..0..1....0..1..1..2..2..1....0..1..1..1..0..1
..0..0..0..2..1..1....0..0..0..1..1..0....0..0..0..2..0..0....0..0..0..1..2..0

Crossrefs

Sequence in context: A230754 A205043 A234896 * A237390 A263237 A263196

Adjacent sequences: A187434 A187435 A187436 * A187438 A187439 A187440

Keyword

nonn

Author

R. H. Hardin, Mar 10 2011

Status

approved