A204684 Number of nX7 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

528, 6427791, 24932875448, 115180678788869, 517329649988490420

Offset

1,1

Comments

Column 7 of A204685

Links

Table of n, a(n) for n=1..5.

Example

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

Crossrefs

Sequence in context: A233173 A233128 A233255 * A205160 A205309 A045788

Adjacent sequences: A204681 A204682 A204683 * A204685 A204686 A204687

Keyword

nonn

Author

R. H. Hardin Jan 18 2012

Status

approved