OFFSET
1,1
COMMENTS
Diagonal of A263558.
EXAMPLE
Some solutions for n=3
..1..0..3..0....1..4..2..3....0..3..4..3....0..4..3..4....0..1..4..4
..0..3..3..1....0..3..3..1....3..0..0..3....4..1..2..4....3..2..1..4
..0..0..2..4....0..1..3..2....1..0..0..1....3..0..4..4....3..2..4..3
..1..2..2..4....1..1..3..3....4..3..4..0....4..0..3..3....1..4..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 21 2015
STATUS
approved