

A230330


Number of n X n 0..2 arrays x(i,j) with each element horizontally, vertically or antidiagonally next to at least one element with value (x(i,j)+1) mod 3, and upper left element zero


0




OFFSET

1,2


COMMENTS



LINKS



EXAMPLE

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


CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



