OFFSET
1,2
LINKS
Andrew Howroyd, Table of n, a(n) for n = 1..50
EXAMPLE
Some solutions for n=6:
.-2...-3...-3...-3...-3...-3...-3...-2...-2...-3...-2...-1...-3...-2...-3...-2
..0....1...-1....0....1....1....0....0...-1...-1....0....0...-1...-1....1...-1
..1...-1....1...-1....1....0....1....2...-1....2....0...-1....1....0...-2....0
.-1....3...-1....1...-1....0...-1...-2....1....1....2....1....0....3....3....0
..1...-1....1....0....0....0....1....0....1....2....0...-1....3...-1....0....3
..1....1....3....3....2....2....2....2....2...-1....0....2....0....1....1....0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 01 2012
EXTENSIONS
a(17)-a(25) from Andrew Howroyd, Mar 02 2017
STATUS
approved