OFFSET
1,1
COMMENTS
Column 3 of A194998
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..32
EXAMPLE
Some solutions for 4X4
..1........3........2........3........1........2........1........3
..2.3......2.1......1.2......2.1......0.1......3.2......2.1......2.3
..1.2.3....1.2.3....2.1.2....3.2.3....1.2.3....2.1.2....1.2.1....3.2.1
..0.1.2.3..0.1.2.3..3.2.3.2..2.3.2.3..2.3.2.1..3.2.1.2..2.1.2.3..2.1.0.1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 07 2011
STATUS
approved