OFFSET
1,1
COMMENTS
Column 4 of A201803
EXAMPLE
Some solutions for n=3
..0.-1..1..0...-2..1..1..0...-2.-2.-1.-1...-1..1.-2..1...-1..2.-2.-2
..0.-1..1..1...-2..1..1..1....2..2..0..0....1..1.-2..1....2..2..0..0
..0.-1..1.-1...-2..1..0..0...-1..2..0..1....0..0.-2..2...-2..0..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 05 2011
STATUS
approved