1,1

Table of n, a(n) for n=1..11.

Some solutions for 4X4

..0..2..2..0....2..0..2..2....1..0..1..1....2..2..0..0....1..1..0..2

..2..2..1..2....0..0..1..2....0..2..2..1....2..1..2..2....1..2..1..1

..2..1..2..2....2..1..1..0....1..2..2..0....0..2..1..2....0..1..0..0

..0..2..2..0....2..2..0..1....1..1..0..1....0..2..2..0....2..1..0..1

Sequence in context: A139695 A241590 A052522 * A061999 A066756 A070872

Adjacent sequences: A193606 A193607 A193608 * A193610 A193611 A193612

nonn

R. H. Hardin Jul 31 2011

approved