1,2

Diagonal of A216338

Table of n, a(n) for n=1..8.

Some solutions for n=4

..0..x..1..x....0..x..1..x....0..x..1..x....0..x..1..x....0..x..1..x

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

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

..x..2..x..1....x..3..x..4....x..0..x..3....x..1..x..3....x..2..x..5

Sequence in context: A208051 A038017 A012993 * A179432 A007542 A090604

Adjacent sequences: A216328 A216329 A216330 * A216332 A216333 A216334

nonn

R. H. Hardin Sep 04 2012

approved