OFFSET
1,1
COMMENTS
Column 3 of A190071
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..200
EXAMPLE
Some solutions for n=4
.-1...-2....2...-2...-1...-1....3....2....1....2...-1....2...-3....2....2...-1
..3...-3....1....3...-3...-1...-2....1....1....2....1...-3....3....1...-2...-1
..3....2...-1...-2...-3....1...-1...-1....1....3...-3...-3...-1...-1...-2...-1
.-2....1....1...-2....2....2....2....2...-1....2...-2...-3...-3...-3...-2....1
.-2...-1...-2...-2....3....3....3...-3....1...-1....2....2...-1....2....2...-1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin May 04 2011
STATUS
approved