OFFSET
1,3
COMMENTS
Row 2 of A264643.
EXAMPLE
Some solutions for n=4
..4..1..2..5....0..6..1..4....0..7..1..4....3..0..6..1....0..7..4..1
..0..3..6..7....3..7..2..5....6..3..5..2....7..4..2..5....6..3..2..5
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 19 2015
STATUS
approved