OFFSET
1,1
COMMENTS
Column 5 of A215924
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..25
EXAMPLE
Some solutions for n=3
..x..0..x..1..x....x..0..x..1..x....x..0..x..0..x....x..0..x..0..x
..2..x..3..x..0....2..x..3..x..0....1..x..1..x..2....1..x..2..x..3
..x..0..x..1..x....x..4..x..1..x....x..0..x..3..x....x..4..x..1..x
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Aug 27 2012
STATUS
approved