1,1
Column 7 of A217457
Table of n, a(n) for n=1..8.
Some solutions for n=3
..0..0..0..2..0..1..0....0..0..0..0..1..0..1....0..0..0..1..2..1..1
..0..0..2..0..0..0..0....0..0..0..0..0..0..0....0..0..1..2..0..1..0
..0..1..0..0..0..0..0....0..1..0..0..2..0..1....0..0..1..0..0..0..0
Sequence in context: A219127 A270203 A049498 * A138932 A217963 A138200
Adjacent sequences: A217453 A217454 A217455 * A217457 A217458 A217459
nonn
R. H. Hardin Oct 03 2012
approved