OFFSET
1,1
COMMENTS
Row 3 of A189951
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..200
EXAMPLE
Some solutions with n=3
..1....3....1....2...-2....2....3....1...-1....2...-3...-1...-3...-1....1....3
.-3...-3...-3...-2....2...-2....1....1...-1....2...-3....3....2....2...-2....3
.-3...-3....2...-2...-1....2...-3....1....1...-1...-3....2....1....1...-1...-3
..2....1...-2...-2...-1....2...-2....1...-1...-1...-1....2....3...-3....3...-1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin May 02 2011
STATUS
approved