1,4

Table of n, a(n) for n=1..14.

Some solutions for n=4

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

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

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

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

Sequence in context: A182188 A099336 A236320 * A295074 A173200 A071746

Adjacent sequences: A211047 A211048 A211049 * A211051 A211052 A211053

nonn

R. H. Hardin Mar 30 2012

approved