OFFSET
1,1
COMMENTS
Column 7 of A216084
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..17
EXAMPLE
Some solutions for n=4
..x..0..x..1..x..2..x....x..0..x..1..x..0..x....x..0..x..1..x..0..x
..1..x..0..x..3..x..4....1..x..0..x..2..x..1....1..x..0..x..2..x..3
..x..4..x..0..x..5..x....x..3..x..0..x..4..x....x..2..x..0..x..4..x
..0..x..2..x..1..x..2....0..x..2..x..3..x..4....3..x..4..x..3..x..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 01 2012
STATUS
approved