A184382 1/12 the number of (n+2)X7 0..2 arrays with each 3X3 subblock containing three of each value

43295, 55386, 73139, 104312, 207470, 503298, 1633604, 7390644, 37119266, 201919862, 1162693358, 6783440940, 40025476760, 238338172356, 1422237022574, 8503994861102, 50939995724510

Offset

1,1

Comments

Column 5 of A184386

Links

Table of n, a(n) for n=1..17.

Example

Some solutions with a(1,1)=0 for 4X7
..0..1..1..0..2..0..0....0..2..1..1..2..1..0....0..1..2..2..0..1..0
..0..1..0..0..1..1..2....0..2..0..0..1..0..1....0..0..1..0..1..2..2
..2..2..2..2..1..2..0....1..1..2..0..2..2..0....2..1..2..0..1..2..0
..0..1..1..0..2..0..0....0..1..2..1..1..2..0....0..1..2..2..0..1..0

Crossrefs

Sequence in context: A321038 A256767 A258677 * A126771 A103875 A224623

Adjacent sequences: A184379 A184380 A184381 * A184383 A184384 A184385

Keyword

nonn

Author

R. H. Hardin Jan 12 2011

Status

approved