I don't think we learned what the numbers were for at all. we just saw them in another location, which happened to be corresponding to the oceanic 6. doesn't explain why they were everywhere outside of coincidence, or i suppose, 'fate'. I didn't find scribbled writing on a ceiling to be an explanation. even then Valenzetti…
There might have been a hint to answer that one in the episode though. If you caught the line when Jack and Kate were arguing and Aaron walked in right when Jack said "You're not even related to him". Which could imply either ignorance or knowledge as to whether Aaron is his nephew or not. I thought the episode was mainly…