I have been continuing with adding house numbers in Glasgow, and today took a walk down Monteith Row, which faces onto Glasgow Green.
As there are only houses on one side of the street, there are only odd numbers. Nothing unusual there, you may think. However, despite the street containing all consecutive odd numbers between 51 and 153. They are not all in order! They go 51, 53, 59, 57, 63, 61, 65, 67, 69, 71. (Although Mapnik doesn't show every one)
I wasn't able to confirm every house number, but either those missing fit into the pattern, or are completely random (which I suggest is not the case).