OFFSET
1,1
COMMENTS
Column 4 of A201958
EXAMPLE
Some solutions for n=2
.-1.-2.-2..3....2..1.-3.-3...-3.-3..2..2...-3..0..0..0....3..0.-2.-1
.-2.-2..3..3....3..1..1.-2....1.-3..2..2....0..3..3.-3...-1..0.-2..3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 06 2011
STATUS
approved