OFFSET
1,1
COMMENTS
Column 4 of A189498
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..200
EXAMPLE
Some solutions for n=5
.-4...-4...-3...-2...-2...-3....4...-4....2...-2....1...-4....2...-3...-4....3
.-4...-2....4....3...-3....2....4....2...-3....4....1....3...-1....2....3...-2
.-3....1....1....1....2....3...-1...-4...-1....3....4....1...-2...-4....1...-2
.-3...-4....4...-2....4...-2...-1...-3....4....4...-2....2...-2....4...-2...-2
..4....4...-4....1....3...-4...-1....3....3....2....4...-3....2....1...-2....3
.-3....2....3....1....3...-1...-1....1...-2...-1....2...-4....1....4....4....3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 23 2011
STATUS
approved