Depends on whether you like abstract tats, detailed tats or old school tats.

You've already decided what the stars represent.

Now you just have to decide what stars you want. The old school stars are the designs you can get at the Microsoft Word's clip-art section. Sounds lame, but they do look nice, if you like it.

The abstract ones and the detailed ones are more about how it's designed. At the end of the day, you're the one telling people what it means when they ask you about it.

I think he's asking how the heck do you generate the bar that accompanies the numbers.

Once again, the internet is your friend
http://www.barcoding.com/upc/

Then why not play around with names.

Like let's say your name is Bob. So B=02, O=15, B=02. So the number becomes 021502.

This way you can tattoo anyone's name on you. And they might not even know if you don't tell them

Holy shit. That's 7 tattoos.

I personally believe the adventure in getting tattoos is by getting one at a time, every 6 months. Therefore you can always look forward to your next tat as the years go by.

But you know what they say, as long as you have money, you can buy whatever the hell you want
And it looks like you managed to buy yourself some satisfaction. Like refurnishing your living room in one go.

Then let it be 13 numbers, man XD
If the bar code is long enough, you can turn it into a band that can wrap around your ankle or your wrist... or your arm

I say let him know that you're going to get it, and that with his blessing or not, you're still going to get it.
And also let him know that out of respect for him, you have made it a point to inform him first rather than get the tattoo then show it to him.

THIS way, he may be disappointed when you get it or before you get it. But overall he won't be shocked. And that's all you'd need. Who care is he disapproves? Make sure he accepts it eventually. It'll be harder for him to accept it, if he's shocked in any way. So inform him before hand.
To avoid any preachy lectures from him, make sure you do let him know that you've made up your mind to get it whether he likes it or not.
To show him that you're not being disrespectful, tell him that you made it a point to tell him first

rubbermilk, are you amelia from inked?

i'm considering the tattoo exhibition thing.