OFFSET
1,1
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..55
EXAMPLE
Some solutions for n=5
.-1....0....2....1...-1...-1....2...-2....0....1...-2....0...-2....1...-1....2
.-1....1...-2...-2...-1....2....1....1...-1....2....0....1...-2...-1...-2...-1
..0....2....2....2...-2....2....0...-2...-1...-2...-2...-2...-2....1...-1...-2
.-1....1....2....2....0....2....1....2...-1....2....1...-1....2...-2....2...-1
.-1....2....2...-2...-2....2...-2...-2...-1....2...-2....0....2....1...-1...-2
.-1....0...-1....1....0....2....1....0...-1....2....1...-1....1...-1....2...-2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 16 2012
STATUS
approved