OFFSET
1,1
COMMENTS
Column 5 of A216460
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..24
EXAMPLE
Some solutions for n=4
..0..x..1..x..2....0..x..1..x..2....0..x..1..x..2....0..x..1..x..2
..x..3..x..4..x....x..2..x..3..x....x..3..x..0..x....x..3..x..0..x
..0..x..2..x..5....3..x..1..x..0....4..x..1..x..5....2..x..1..x..3
..x..3..x..0..x....x..0..x..4..x....x..0..x..6..x....x..4..x..0..x
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 07 2012
STATUS
approved