OFFSET
1,2
COMMENTS
Column 2 of A200038
EXAMPLE
Some solutions for n=6
.-2...-2....2...-2....1...-1....1....1....2....2....1....2....2....1....1....1
..2....2...-1....1...-1...-2...-1....2...-2...-2...-1...-1...-2...-1...-2...-2
.-1....1....1....2....2...-1....2...-2...-1...-1....1...-2...-1....2....2....2
..2....2...-2...-1....1....1...-1...-1....2....1...-2....1...-2...-2...-1...-2
.-2...-1....1...-2...-2....2....1....1...-2...-2...-1....2....1....1....1...-1
..1...-2...-1....2...-1....1...-2...-1....1....2....2...-2....2...-1...-1....2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 12 2011
STATUS
approved