OFFSET
1,1
COMMENTS
Row 3 of A216460
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..41
EXAMPLE
Some solutions for n=4
..0..x..1..x....0..x..1..x....0..x..1..x....0..x..1..x....0..x..1..x
..x..2..x..0....x..2..x..3....x..2..x..3....x..2..x..3....x..2..x..0
..0..x..3..x....3..x..4..x....4..x..5..x....0..x..1..x....3..x..4..x
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 07 2012
STATUS
approved