`  But thats exactly how it's written there, quite at the beginning:  F(n) = number of compositions of n+1 with no part equal to 1 [Grimaldi]  Of course I could say it in my own words.  ``It is poor Wikiquette...``'' That may be your personal opinion. The English Wikipedia isn't written only by native speakers, and so it's always possible, that something is written in an unusual way. And later fixed by someone who knows better. Apart from that: When you don't see mistakes, there's nothing to complain about.   `