1,1
Column 5 of A220406
Table of n, a(n) for n=1..6.
Some solutions for n=3
..0..0..1..0..0....0..0..0..0..1....1..0..1..0..1....0..1..0..1..0
..0..0..1..1..0....0..1..0..0..0....0..0..0..0..0....0..1..0..1..1
..0..0..0..0..0....0..1..0..1..0....1..1..1..0..0....0..1..1..1..0
Sequence in context: A197484 A218835 A219417 * A109304 A134113 A071584
Adjacent sequences: A220402 A220403 A220404 * A220406 A220407 A220408
nonn
R. H. Hardin Dec 13 2012
approved