[seqfan] Re: Displaying an o.g.f for binomial(mn,n)

[Ed Jeffery]

Tom,

Pardon me for butting in:

As a starting point, your equation might written something like

z^3 = 1/(2*sqrt(delta))*sum[i, 1, 4; prod[j, k <> i; 1 <= j < k <= 4;
abs(x_j - x_k)]].

Unfortunately there are many variations of notation of expressions
involving sum[] and prod[] in OEIS. I think it would be good to have only
one fixed format for them given on the style page.

Ed