1,1

Column 2 of A187408

Table of n, a(n) for n=1..10.

Some solutions for 4X4

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

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

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

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

Sequence in context: A137059 A263966 A083084 * A303147 A317354 A050787

Adjacent sequences: A187399 A187400 A187401 * A187403 A187404 A187405

nonn

R. H. Hardin Mar 09 2011

approved