Django: Admin inline forms initial data for every instance

I've been reading a lot but I don't seem to be able to figure out a solution to this.

I'm writing an application in Django, I'm still writing the admin side.

I have a model called "Environments" and a model called "Servers", there is a ForeignKey relation between Servers and Environments such as a given Environment has several servers.

When modifying the "add" form for Environments in the admin interface I use a Inline form to be able to visualize the list of Servers that will be associated to the Environment, something like this:

class ServerInline(admin.TabularInline):
    model = Server
    extra = 39

class EnvironmentAdmin(admin.ModelAdmin):
    inlines = [ServerInline]

Pretty simple right?

What I would like to do is prepopulate the Servers inline forms with default values, I've been able to prepopulate them with the same value doing this:

class ServerInlineAdminForm(forms.ModelForm):
    class Meta:
        model = Server

    def __init__(self, *args, **kwargs):
        super(ServerInlineAdminForm, self).__init__(*args, **kwargs)
        self.initial['name']='Testing'

class ServerInline(admin.TabularInline):
    form = ServerInlineAdminForm
    model = Server
    extra = 39

class EnvironmentAdmin(admin.ModelAdmin):
    inlines = [ServerInline]

But this isn't what I want, I would like to be able to initialize the 39 Server form instances with 39 different values that I have in a list. What would be the best way to do that??

Thank you!