Do special numbers (transcendental number, first few elements of a certain sequences and so on ...) make good passwords in terms of brute force breaking ?
EDIT: Why am I asking this ?
A friend of mine is composing a list of few recommendations on how people in his workplace should choose passwords. From what he told me, he used a "standard" one at first (you know, "choose your password from one to six letters and two numbers ...") and came to a conclusion that most people just ignore those recommendations and just uses passwords like "password", "date of birth", ...
So he decided to invent a list of more interesting recommendations, hoping it will motivate people to at least give it some thought. And so we started thinking on what to put on the list that could prove useful.