1,3

Diagonal of A222371

Table of n, a(n) for n=1..8.

Some solutions for n=4

..0..0..0..0....0..0..0..1....0..0..0..0....0..1..1..1....0..1..1..2

..0..0..0..0....0..0..0..1....0..0..0..0....0..1..1..1....2..2..2..2

..0..0..0..0....0..0..0..2....1..1..1..1....0..1..1..1....2..2..2..2

..1..1..0..1....0..0..0..1....1..1..1..1....1..1..1..1....2..2..2..2

Sequence in context: A096543 A209412 A138733 * A316330 A015102 A086124

Adjacent sequences: A222360 A222361 A222362 * A222364 A222365 A222366

nonn

R. H. Hardin Feb 17 2013

approved