OFFSET
1,1
COMMENTS
Diagonal of A251885
EXAMPLE
Some solutions for n=3
..0..1..1..0..4....0..0..3..0..4....1..1..1..3..1....4..0..3..0..0
..3..1..1..3..3....4..0..1..4..0....0..4..3..0..4....0..4..3..0..4
..4..0..3..4..0....1..3..1..3..3....4..0..3..4..0....3..1..1..3..1
..0..4..3..0..4....0..4..3..0..0....3..1..1..3..1....2..0..3..4..0
..3..1..1..3..1....4..0..3..0..0....0..4..1..0..2....0..2..1..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 10 2014
STATUS
approved