1,2

Row 4 of A220959

Table of n, a(n) for n=1..7.

Some solutions for n=3

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

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

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

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

Sequence in context: A093294 A107613 A220797 * A218648 A278321 A189414

Adjacent sequences: A220958 A220959 A220960 * A220962 A220963 A220964

nonn

R. H. Hardin Dec 26 2012

approved