A204681 Number of nX4 0..3 arrays with no occurrence of three equal elements in a row horizontally, vertically, diagonally or antidiagonally, and new values 0..3 introduced in row major order

12, 2191, 287379, 40919141, 5770321516, 815364171994, 115180678788869, 16271532972153414, 2298647402512667451, 324726122304981135405, 45873499136412060284740, 6480470930161792394441041

Offset

1,1

Comments

Column 4 of A204685

Links

Ron Hardin, Table of n, a(n) for n = 1..73

Example

Some solutions for n=5
..0..0..1..2....0..0..1..0....0..0..1..0....0..0..1..2....0..0..1..1
..0..1..2..1....1..1..2..0....1..0..1..0....1..2..1..1....0..0..2..0
..2..3..1..2....2..0..1..1....0..1..2..2....3..2..0..3....3..1..2..0
..0..2..2..3....2..0..2..2....2..3..2..2....3..0..1..3....3..1..1..2
..2..0..0..1....1..1..3..2....3..1..1..3....2..1..1..2....0..2..0..2

Crossrefs

Sequence in context: A064074 A005249 A177069 * A205157 A268071 A205306

Adjacent sequences: A204678 A204679 A204680 * A204682 A204683 A204684

Keyword

nonn

Author

R. H. Hardin Jan 18 2012

Status

approved