A207197 Number of nX4 0..2 arrays avoiding the pattern z-1 z-1 z in any row or column

69, 4761, 247002, 12539372, 632716336, 31901664357, 1610194874799, 81287871720373, 4104318500772121, 207237297025296600, 10464020397550910416, 528359580441380112910, 26678441328805428234587, 1347073335296997275306445

Offset

1,1

Comments

Column 4 of A207201

Links

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

Example

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

Crossrefs

Sequence in context: A206730 A207354 A207985 * A207217 A296785 A363927

Adjacent sequences: A207194 A207195 A207196 * A207198 A207199 A207200

Keyword

nonn

Author

R. H. Hardin Feb 15 2012

Status

approved