This isn't the whole intro, but if you're going to play the chords and want to do the
first, it's something like:
Just hold and normal A chord and do the following twice:
[ Tab from: http://www.guitaretab.com/j/jimmy-buffett/250232.html ]
e --------------------------5--------|
--2-----2------2h3--2-------------|
----2-----2-----------2-----------|
------2-----2-----------2---------|
--0------------0------------------|
E -----------------------------------|
I think that's either right or close enough that any Jimmy fan will like it.