1,1

Column 6 of A220204.

Table of n, a(n) for n=1..7.

Some solutions for n=3

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

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

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

Cf. A220204.

Sequence in context: A220015 A005912 A264581 * A104677 A156375 A219718

Adjacent sequences: A220199 A220200 A220201 * A220203 A220204 A220205

nonn

R. H. Hardin Dec 07 2012

approved