OFFSET
1,1
COMMENTS
Column 3 of A189498.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..200
EXAMPLE
Some solutions for n=5
.-3....2...-3...-2...-3....2....3...-1....2....2...-1...-3...-1....2....2...-1
.-2...-3...-1...-1...-2...-2...-1....2....2....1....2...-2...-1...-2...-3...-1
.-1....2...-2...-3...-2....3...-1....2...-2...-3....1....2...-3...-2...-2...-3
.-3....1....1...-3...-2...-3...-3...-1...-3....2...-1...-2...-3...-1....1....2
..2....1....2....3....1...-2...-1....3....2....1....1...-3....1....2....1....1
.-2....3...-2...-2...-2...-1....1....1....1...-3....1...-3....1...-2....1...-2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 23 2011
STATUS
approved