1,1
Column 7 of A200858
Table of n, a(n) for n=1..6.
Some solutions for n=3
..0..0..0..0..0..0..2....0..0..0..0..0..1..2....0..0..0..0..1..1..4
..0..0..0..4..1..1..4....0..0..0..0..1..1..3....0..0..0..3..1..1..4
..0..0..0..4..3..2..4....0..0..0..2..3..4..3....0..0..0..4..1..2..4
Sequence in context: A234560 A232389 A209946 * A351680 A157627 A072598
Adjacent sequences: A200854 A200855 A200856 * A200858 A200859 A200860
nonn
R. H. Hardin Nov 23 2011
approved