A186551 1/8192 the number of (n+2) X 7 0..3 arrays with each 3 X 3 subblock trace equal to some horizontal or vertical neighbor 3 X 3 subblock trace.

3090668, 6215002266, 5253540132125, 5541254050323697, 5484853650034152292, 5583822993675095945553

Offset

1,1

Comments

Column 5 of A186553.

Links

Table of n, a(n) for n=1..6.

Example

Some solutions for 4 X 7
..0..0..0..1..0..2..2....0..0..0..3..3..1..2....0..0..0..2..1..3..1
..0..0..0..0..1..2..1....0..0..0..0..0..1..1....0..0..0..0..3..3..3
..0..0..0..0..0..1..1....0..0..0..0..0..2..1....0..0..0..0..0..0..1
..0..0..0..0..0..3..1....0..0..0..0..0..3..1....0..0..0..0..0..0..2

Crossrefs

Cf. A186553.

Sequence in context: A190462 A282746 A212854 * A172606 A234151 A067899

Adjacent sequences: A186548 A186549 A186550 * A186552 A186553 A186554

Keyword

nonn

Author

R. H. Hardin Feb 23 2011

Status

approved