A205159 Number of n X 6 0..3 arrays with no occurrence of three equal elements in a row horizontally, vertically or nw-to-se diagonally, and new values 0..3 introduced in row major order.

143, 447343, 754700909, 1427843505563, 2654271236904226, 4948963310952700521, 9223088985799640757493, 17190329064400885392195249, 32039205913239024375598390394

Offset

1,1

Links

Table of n, a(n) for n=1..9.

Example

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

Crossrefs

Column 6 of A205161.

Sequence in context: A046179 A208680 A204683 * A205308 A147553 A030122

Adjacent sequences: A205156 A205157 A205158 * A205160 A205161 A205162

Keyword

nonn

Author

R. H. Hardin, Jan 22 2012

Status

approved