1,1

Column 4 of A221773

Table of n, a(n) for n=1..11.

Some solutions for n=3

..0..1..0..2....1..1..0..0....0..3..0..0....0..1..1..2....0..1..0..1

..1..1..0..1....1..1..2..2....1..3..0..1....1..2..1..0....0..2..1..2

..0..3..3..0....0..0..4..0....1..1..1..1....1..1..2..0....1..3..0..1

Sequence in context: A300577 A304643 A153848 * A007593 A219104 A219983

Adjacent sequences: A221768 A221769 A221770 * A221772 A221773 A221774

nonn

R. H. Hardin Jan 25 2013

approved