I did some search on Google and came across [this website][1].

Unfortunately, it's in Spanish... Any Spaniards here? :)

Copying and pasting the description from the website into Google translator doesn't give much information about the inscription, only this:

> However, we opted for a reinterpretation and renewal of the ornamental motifs, giving clues to the period of construction, determined by the technology of the "zeros and ones".

So I would think it's random / artistic.

Also, i think [this is][2] the architect's personal website, so you can contact him! :)


  [1]: http://www.poma.cat/cat/projectes/habitatge/plurifamiliar-martorell.html
  [2]: http://www.perepuigarquitecte.com/index.php?lang=eng