A207129 Number of n X 3 0..3 arrays avoiding the pattern z z+1 z in any row or column.

61, 3721, 197144, 10372917, 546965177, 28848306206, 1521486186616, 80244105724945, 4232124574042091, 223204941516339823, 11771970446658242928, 620861199183478906328, 32744614050424872414063, 1726971746484789854841910

Offset

1,1

Comments

Column 3 of A207134.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=4
..1..0..2....3..2..2....0..0..3....1..3..2....0..2..0....2..0..1....0..3..3
..3..2..1....0..2..3....2..3..1....2..0..2....3..0..0....0..2..0....0..1..3
..1..0..3....3..0..1....1..2..0....2..1..1....2..1..1....1..2..2....2..1..1
..3..0..1....2..3..3....1..0..0....0..1..1....0..2..1....3..0..0....2..1..1

Crossrefs

Cf. A207134.

Sequence in context: A207577 A209087 A207052 * A302329 A218286 A126434

Adjacent sequences: A207126 A207127 A207128 * A207130 A207131 A207132

Keyword

nonn

Author

R. H. Hardin, Feb 15 2012

Status

approved