1,1

Column 7 of A220579

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

Some solutions for n=3

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

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

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

Sequence in context: A302964 A302807 A303468 * A067821 A283491 A300471

Adjacent sequences: A220575 A220576 A220577 * A220579 A220580 A220581

nonn

R. H. Hardin Dec 16 2012

approved