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1,1
Column 7 of A183492
Table of n, a(n) for n=1..6.
Some solutions for 3X7
..0..0..0..0..0..0..0....0..0..0..0..0..1..1....0..0..0..0..0..0..3
..2..1..1..2..3..3..3....2..2..0..2..0..2..2....2..0..3..1..1..0..3
..2..1..1..2..3..3..3....0..0..0..2..0..1..1....2..0..3..1..1..0..0
Sequence in context: A274591 A232293 A232366 * A232307 A232457 A262662
Adjacent sequences: A183487 A183488 A183489 * A183491 A183492 A183493
nonn
R. H. Hardin Jan 05 2011
approved