A184455 1/36 the number of (n+2) X 9 0..2 arrays with each 3 X 3 subblock containing two of one value, two of another, and five of the last.

203391, 216477, 232326, 253176, 309042, 413100, 660654

Offset

1,1

Comments

Column 7 of A184457.

Links

Table of n, a(n) for n=1..7.

Example

Some solutions with a(1,1) = 0 for 4 X 9
..0..0..0..2..2..1..1..1..1....0..0..0..2..1..1..2..1..1
..0..1..1..2..1..2..1..2..2....0..1..1..2..0..2..2..2..2
..0..2..2..2..0..0..1..0..0....0..2..2..2..2..0..2..0..0
..0..0..0..2..2..1..1..1..1....0..0..0..2..1..1..2..1..1

Crossrefs

Cf. A184457.

Sequence in context: A290505 A205891 A186532 * A369898 A210017 A176167

Adjacent sequences: A184452 A184453 A184454 * A184456 A184457 A184458

Keyword

nonn

Author

R. H. Hardin, Jan 14 2011

Status

approved