OFFSET
1,2
COMMENTS
Subdiagonal 1 of A267562.
EXAMPLE
Some solutions for n=5
..0..1..2..2..3....0..1..2..3..4....0..0..1..1..2....0..0..0..0..0
..0..1..2..3..4....1..2..3..4..5....0..0..1..2..3....5..5..5..5..5
..1..2..3..4..5....2..3..4..5..0....0..1..2..3..4....4..4..4..4..4
..2..3..4..5..0....3..4..5..0..1....1..2..3..4..5....3..3..3..3..3
..3..4..5..0..1....4..5..0..1..2....2..3..4..5..5....2..2..2..2..2
..4..5..5..0..1....5..0..1..2..3....3..4..4..5..5....1..1..1..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 17 2016
STATUS
approved