1,2

Diagonal of A221356

Table of n, a(n) for n=1..9.

Some solutions for n=3

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

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

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

Sequence in context: A051233 A124623 A220195 * A197681 A197624 A199973

Adjacent sequences: A221352 A221353 A221354 * A221356 A221357 A221358

nonn

R. H. Hardin Jan 12 2013

approved