1,1

Column 5 of A220313

Table of n, a(n) for n=1..6.

Some solutions for n=3

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

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

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

Sequence in context: A267723 A218999 A220368 * A288686 A013587 A126159

Adjacent sequences: A220309 A220310 A220311 * A220313 A220314 A220315

nonn

R. H. Hardin Dec 10 2012

approved