Minimal generating set size

[Max]

On 3/14/06, Edwin Clark <eclark at math.usf.edu> wrote:

> In addition I computed the following values for the two dimensional
> case: 4,4,4,6,6,7 for the cases n = 1,2,3,4,5,6 where the n-th
> square is {(x,y): x,y in {0,1,...,n}}. I plan to add this to the
> OEIS soon. I want to first look at Guy's book and the Alon paper
> to see if they have calculated more values.

As I can see there is no any particular numbers neither in Alon's
paper nor in Guy's book (I have the second edition, where this problem
is numbered F3).
Let me know if you have troubles accessing Alon's paper, I have it in PDF.

Max