1,1

Column 5 of A220461

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

Some solutions for n=3

..0..0..0..1..0....1..1..1..1..1....1..0..0..1..0....1..1..1..0..0

..0..0..0..0..0....1..0..0..0..1....0..0..0..0..0....0..0..0..0..1

..0..1..1..0..0....0..0..1..0..0....0..0..1..0..0....1..0..1..1..0

Sequence in context: A222383 A282312 A110394 * A160446 A317894 A228982

Adjacent sequences: A220456 A220457 A220458 * A220460 A220461 A220462

nonn

R. H. Hardin Dec 15 2012

approved