1,1

Diagonal of A206188.

Table of n, a(n) for n=1..6.

Some solutions for n=4:

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

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

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

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

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

Sequence in context: A206319 A216397 A090650 * A251968 A017116 A206055

Adjacent sequences: A206178 A206179 A206180 * A206182 A206183 A206184

nonn

R. H. Hardin, Feb 04 2012

approved