OFFSET

1,2

COMMENTS

Every 0 is next to 0 4's, every 1 is next to 1 0's, every 2 is next to 2 2's, every 3 is next to 3 1's, every 4 is next to 4 3's

Diagonal of A196718

EXAMPLE

Some solutions for n=4

..0..0..0..1....2..2..0..0....2..2..2..1....1..0..0..1....1..0..1..1

..1..3..1..3....2..2..1..1....2..0..2..0....1..1..1..1....3..1..1..0

..3..1..1..1....0..1..1..3....2..2..2..0....0..1..3..0....1..1..1..0

..1..0..0..0....1..1..0..1....0..0..0..0....0..1..1..0....0..0..1..1

CROSSREFS

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 05 2011

STATUS

approved