OFFSET
1,1
COMMENTS
Column 2 of A226422
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..70
EXAMPLE
Some solutions for n=3
.-1...-2....0...-2...-1...-1...-2....1...-2...-2...-1...-1...-1...-2...-2...-1
..0...-2....1...-1...-1...-1...-1....1...-2....1....1....1....2...-1....1...-1
..1....1....2....2....2...-1....1....1...-1....1....1....2....2...-1....2....1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jun 06 2013
STATUS
approved