OFFSET
1,1
COMMENTS
Diagonal of A186180
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..11
EXAMPLE
Some solutions for 4X4
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
..0..0..0..3....0..0..0..3....0..0..0..3....0..0..0..0....0..0..0..0
..1..1..1..5....0..0..1..1....0..1..2..5....0..1..4..5....0..1..2..3
..1..1..2..5....0..3..1..0....5..3..5..4....0..4..4..0....0..4..4..5
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 13 2011
STATUS
approved