Talk:Orthogonal array

Question

I have problems understanding your article. For instance, you write:

Latin squares are $OA(n^{2},3,n,2)$. In order to see this, consider all triples $(i,j,s(i,j))$ where $s(i,j)$ — symbol in i-th row and j-th column in the latic [latin? PW] square. Then $n^{2}$ such triples for all $i,j\in {0,\dots ,s-1}$

but then in the example i and j run from 1 to 3 and do not start at 0. And what is s, is it 3? If so, I find it confusing that you use s for the number of "symbols" and s(i,j) for the "symbol" itself. What is the difference between n and s? Also, the term "symbol" sounds odd to me, would "object" not be a better word, or is the word symbol standard in this subfield of math?--Paul Wormer 06:42, 23 June 2008 (CDT)