OFFSET
1,2
COMMENTS
Column 5 of A270850.
EXAMPLE
Some solutions for n=4
.....4........2........0........0........2........3........0........4
....0.3......0.2......0.3......3.0......0.1......4.3......3.5......5.3
...1.0.0....0.0.0....1.0.2....0.0.2....2.1.0....3.4.5....5.5.4....3.4.4
..0.1.1.0..2.1.0.2..0.0.1.1..3.3.0.0..2.0.2.1..4.4.3.5..4.3.5.5..2.5.3.5
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 24 2016
STATUS
approved