OFFSET
1,2
COMMENTS
Column 4 of A208805.
LINKS
Andrew Howroyd, Table of n, a(n) for n = 1..50
EXAMPLE
Some solutions for n=6:
.-3...-4...-4...-3...-2...-2...-3...-2...-3...-4...-3...-3...-4...-3...-4...-3
.-1....0....1....2...-2...-1...-1....0...-2...-2...-2...-1...-2....0...-3....0
.-2....0....1...-2....0....1...-2....2....0....3....1....0....3....3....1....1
..3....3...-3....3...-2....3...-1...-2....0...-1....1...-1....1...-1....3...-3
..2....1....2...-2....3...-2....4....2....2....2....4....1....3...-2....1....1
..1....0....3....2....3....1....3....0....3....2...-1....4...-1....3....2....4
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 01 2012
EXTENSIONS
a(15)-a(20) from Andrew Howroyd, Mar 02 2017
STATUS
approved