1,2
Diagonal of A299366.
Table of n, a(n) for n=1..9.
Some solutions for n=5
..0..1..1..1..1. .0..1..1..1..1. .0..0..1..1..1. .0..1..1..1..1
..1..1..0..0..1. .1..1..0..0..1. .1..0..1..1..1. .1..1..0..0..1
..1..0..0..1..0. .0..1..0..1..0. .0..0..1..1..1. .0..1..0..1..1
..1..1..0..0..1. .1..1..1..0..0. .0..1..0..0..0. .1..1..1..1..0
..1..0..0..1..1. .1..1..0..0..1. .1..1..0..1..0. .1..0..1..0..0
Cf. A299366.
Sequence in context: A003487 A055490 A261935 * A002811 A177134 A199361
Adjacent sequences: A299357 A299358 A299359 * A299361 A299362 A299363
nonn
R. H. Hardin, Feb 08 2018
approved