1,2
Table of n, a(n) for n=1..8.
Some solutions for n=4
..0..1..1..1....0..0..0..0....0..1..1..1....0..0..1..1....0..0..0..1
..1..0..0..1....1..0..0..0....0..0..1..1....0..0..1..1....0..0..1..1
..0..0..0..1....1..1..0..1....0..1..0..0....1..1..0..0....1..1..0..0
..0..0..1..0....1..1..0..0....0..0..0..0....0..1..0..0....1..1..0..0
Sequence in context: A136224 A321963 A307903 * A009533 A135906 A197446
Adjacent sequences: A213593 A213594 A213595 * A213597 A213598 A213599
nonn
R. H. Hardin Jun 15 2012
approved