1,1
Column 4 of A185609
Table of n, a(n) for n=1..5.
Some solutions for 3X5
..0..0..3..3..1....0..0..0..2..1....0..0..1..0..2....0..0..3..0..3
..0..0..0..0..0....0..0..2..3..1....0..0..3..0..2....0..0..1..0..2
..1..2..2..1..0....2..0..2..1..0....3..0..3..0..1....1..0..3..0..0
Sequence in context: A060109 A217875 A253737 * A204148 A251825 A119568
Adjacent sequences: A185605 A185606 A185607 * A185609 A185610 A185611
nonn
R. H. Hardin Jan 31 2011
approved