There have been many instances of 'first contact' in Star Trek.
I'm interested in knowing how many of those civilisations have gone on to join the Federation.
Obviously all the races in the Federation had a first contact at one point or another, so you could just give the answer "all of them", but I'm specifically thinking of those whose first contact was shown in an episode or film, and then shown later as being full Federation members.
To clarify, in response to the comments:
What I'm really looking is for races who were contacted by the Federation and then joined it as members.
So that excludes Humans, Vulcans, et al, who were founding members and also any other species who already had contact prior to the Federation being formed, even if they didn't actually join it from the beginning.
As a related question, I'm also interested in how long it would typically take between first contact with the Federation and gaining membership to it, though I guess I may need to ask that as a separate question.