OFFSET
1,1
LINKS
Andrew Howroyd, Table of n, a(n) for n = 1..190 (terms 1..16 from R. H. Hardin)
EXAMPLE
Some solutions for n=4
..0..0..0....0..0..0....0..0..1....0..0..0....0..0..0....0..0..0....0..1..0
..1..1..1....1..1..1....1..2..1....1..1..2....1..1..1....1..2..1....2..1..0
..0..2..2....2..0..2....1..2..0....2..0..0....0..2..0....0..0..0....0..1..3
..1..1..0....1..0..1....0..2..0....3..1..4....1..1..0....2..1..1....0..4..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 22 2012
STATUS
approved