The derivative of that expression seems to be 0, zero, zilch, nada, nothing, even with only one e. So presumably n can be pretty much anything one chooses e.g. pi^(pi^(pi^.........pi) and not be wrong.
But I probably am!
blackjack
<a href="http://c.casalemedia.com/c?s=51816&f=3&id=0" target="_blank"><img src="http://as.casalemedia.com/s?s=51816&u=http://perplexus.info&f=3&id=0&if=0" width="120" height="600" border="0"></a>
flooble's webmaster puzzle
Possible approach
