1,2
Diagonal of A316289.
Table of n, a(n) for n=1..10.
Some solutions for n=5
..0..0..0..1..0. .0..1..1..1..1. .0..0..0..0..1. .0..0..1..1..0
..0..0..0..1..1. .1..0..1..1..1. .0..0..0..0..0. .1..0..1..1..1
..0..0..0..0..0. .0..1..1..1..1. .1..0..0..0..0. .1..1..1..1..1
..0..0..0..1..0. .1..0..1..1..1. .1..1..0..1..1. .1..1..0..0..1
..1..1..1..0..1. .0..1..1..1..0. .0..0..0..1..0. .1..1..1..0..1
Cf. A316289.
Sequence in context: A020068 A266474 A238723 * A236328 A284337 A052666
Adjacent sequences: A316280 A316281 A316282 * A316284 A316285 A316286
nonn
R. H. Hardin, Jun 28 2018
approved