Hello all, my apologies for the newbie question, but... I can run this:
ChromaticPolynomial[GridGraph[{7,7}], z]
and after a few seconds I get an answer. But if I try it with {7,8}, the evaluation just stops after a few seconds, and the result is the same expression with a pictorial representation of the graph inside the square brackets.
Why is the evaluation stopping? Am I running out of memory? Is there any way to force it to continue, even if it takes a long time? Am I running into some time limit due to the fact that this is a free trial?
Thanks in advance for any insight.