OFFSET
1,2
COMMENTS
Column 5 of A271034.
EXAMPLE
Some solutions for n=4
.....1........1........0........0........1........0........0........2
....0.1......1.2......1.2......3.3......1.1......0.4......1.1......0.2
...0.2.2....0.3.4....1.2.4....0.3.3....1.1.2....4.4.4....3.5.5....0.2.3
..3.3.3.4..3.3.5.5..2.2.5.4..0.3.5.5..3.2.3.4..5.5.4.5..1.5.5.5..1.2.4.5
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 29 2016
STATUS
approved