Are these common logs (base 10)?
Regardless of the base, when n is 3, which is odd, the formula calls for finding log(f(1)), but f(1) is given as zero and has no log.
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
re: Spoiler
