OFFSET
1,2
COMMENTS
Column 4 of A194794
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..15
EXAMPLE
Some solutions for 4X4
..0........0........0........0........0........0........0........0
..1.2......1.2......1.2......1.2......1.2......1.2......1.2......1.2
..3.0.4....0.3.1....3.0.3....3.4.1....0.3.1....3.4.0....3.0.4....0.3.1
..4.1.2.1..1.4.2.0..4.1.2.0..1.2.0.2..4.2.0.4..2.1.3.2..4.2.3.0..2.4.0.4
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 03 2011
STATUS
approved