OFFSET
1,1
COMMENTS
Column 3 of A194931
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..16
EXAMPLE
Some solutions for 4X4
..1........2........0........2........1........3........0........0
..2.1......2.3......0.0......2.3......2.1......2.3......1.1......1.0
..2.1.1....1.2.2....1.1.1....3.2.2....1.2.3....2.2.1....1.0.1....2.1.0
..1.1.2.2..2.2.2.1..2.2.2.2..2.3.2.3..2.3.3.3..2.2.1.2..2.1.2.3..2.1.0.1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 05 2011
STATUS
approved