OFFSET
1,2
COMMENTS
Column 2 of A199530
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..200
EXAMPLE
Some solutions for n=5
.-1....2....0...-1...-1....1...-2....2....1....1....0....0...-2....0...-1...-1
..0....1...-2....2....2....1....2...-2....0....2...-1....1....1....1....0...-2
.-2...-2....1....2....2....1...-2....2....1...-1...-1....1....2...-2....2....0
..1...-1....0...-2...-1...-2....2....0...-2....0....0...-1....1....2....1....2
..2....0....1...-1...-2...-1....0...-2....0...-2....2...-1...-2...-1...-2....1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 07 2011
STATUS
approved