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

Author

R. H. Hardin Jan 18 2012

Keywords

• nonn

Comments

Column 4 of A204685

Examples

			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
		

Links

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