OFFSET
0,2
EXAMPLE
Some solutions for n=4
..1..1..0..1....0..0..2..1....2..0..1..1....2..0..2..2....2..1..1..0
..0..2..1..0....1..1..1..0....0..1..2..1....1..2..1..2....0..2..0..2
..2..0..0..1....2..0..0..1....2..1..0..1....1..2..2..1....1..0..2..1
..0..0..2..1....0..2..0..1....0..2..1..1....2..2..1..1....1..1..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 20 2002
EXTENSIONS
a(7) and example from R. H. Hardin, Jan 05 2012
a(8)-a(12) from Andrew Howroyd, Jun 01 2017
a(0)=1 prepended by Andrew Howroyd, Oct 14 2024
STATUS
approved