1,1
Column 6 of A183680
Table of n, a(n) for n=1..5.
Some solutions for 3X7
..4..6..6..1..4..4..6....2..2..4..2..3..5..3....4..6..0..7..1..6..4
..2..2..0..7..2..4..0....6..4..4..4..5..1..5....0..4..4..3..3..4..0
..4..6..6..1..4..4..6....2..2..4..2..3..5..3....6..4..2..5..3..4..6
Sequence in context: A339536 A319064 A344831 * A234793 A227040 A227039
Adjacent sequences: A183676 A183677 A183678 * A183680 A183681 A183682
nonn
R. H. Hardin Jan 06 2011
approved