A199129 Number of nX4 0..2 arrays with values 0..2 introduced in row major order, the number of instances of each value within one of each other, and no element equal to any horizontal or vertical neighbor

3, 12, 19, 258, 1409, 2836, 48320, 295092, 629776, 11499816, 73045294, 159683856, 3012721252, 19537447260, 43276955012, 832789320948, 5471578311520, 12222775051564, 238366172778672, 1580313985819656, 3551105861275344

Offset

1,1

Comments

Column 4 of A199133

Links

R. H. Hardin, Table of n, a(n) for n = 1..75

Example

Some solutions for n=5
..0..1..0..2....0..1..0..1....0..1..2..1....0..1..2..1....0..1..2..0
..1..0..2..1....2..0..2..0....2..0..1..2....2..0..1..2....1..2..0..2
..2..1..0..2....1..2..1..2....0..2..0..1....1..2..0..1....2..1..2..1
..1..0..2..1....0..1..2..1....2..0..1..2....2..0..1..0....0..2..1..0
..0..2..1..0....1..2..0..2....0..2..0..1....0..1..0..2....2..1..0..1

Crossrefs

Sequence in context: A117554 A049714 A363639 * A257942 A063244 A344015

Adjacent sequences: A199126 A199127 A199128 * A199130 A199131 A199132

Keyword

nonn

Author

R. H. Hardin Nov 03 2011

Status

approved