OFFSET
1,1
COMMENTS
Row 3 of A225987.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..145
EXAMPLE
Some solutions for n=1
.-1..3...-1..3....3..3...-1..3...-1..3...-1..3...-1..3...-1.-1....3..3...-1..3
..3..3...-1..3...-1..3....3..3...-1..3....3.-1...-1..3...-1.-1...-1..3....3.-1
.-1..3....3..3...-1..3....3.-1....3.-1....3..3...-1..3...-1.-1....3.-1....3..3
..3.-1....3.-1....3.-1...-1..3....3..3...-1..3....3..3...-1..3....3.-1....3.-1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 22 2013
STATUS
approved