OFFSET
1,1
COMMENTS
Column 4 of A215182
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..109
EXAMPLE
Some solutions for n=4
.....2........2........3........2........2........4........1........2
....2.2......1.3......3.3......2.2......1.3......4.4......0.2......2.2
...0.3.3....0.2.4....1.4.4....1.1.4....1.1.4....4.4.4....0.1.2....2.2.2
..0.0.4.4..0.0.4.4..0.4.4.4..1.1.2.4..0.2.2.4..4.4.4.4..0.0.2.2..1.1.3.3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Aug 05 2012
STATUS
approved