A184500 1/12 the number of (n+2)X4 0..2 arrays with each 3X3 subblock containing one of one value, three of another, and five of the last

1248, 4546, 17077, 66822, 281876, 1216766, 5366312, 24695528, 114505124, 534949496, 2567370992, 12316518616, 59141443312, 289367917056, 1410929565184, 6867521323040, 33909820091856, 166706262886704, 817341247311824

Offset

1,1

Comments

Column 2 of A184505

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Example

Some solutions with a(1,1)=0 for 6X4
..0..0..0..1....0..0..0..0....0..0..0..1....0..0..0..0....0..0..0..1
..0..2..1..0....1..0..2..1....0..1..0..0....1..1..1..1....0..1..1..1
..1..0..1..0....2..2..0..2....1..2..1..0....0..0..2..0....0..1..2..0
..1..0..1..0....0..0..0..0....0..1..1..1....1..0..1..1....1..1..0..0
..1..0..2..1....0..2..1..0....0..0..1..0....0..0..1..0....0..1..1..1
..1..1..0..0....0..1..1..0....1..2..1..0....2..0..0..2....1..0..2..1

Crossrefs

Sequence in context: A069146 A251648 A235021 * A234212 A047629 A221012

Adjacent sequences: A184497 A184498 A184499 * A184501 A184502 A184503

Keyword

nonn

Author

R. H. Hardin Jan 16 2011

Status

approved