Heidelberg Catechism vanity plates

This morning at the Redeemer campus I saw a car whose licence plates bore the following: "Q N A 1," with spaces between the letters and number. It took me a moment to realize that the reference was likely to the classic Question and Answer 1 of the Heidelberg Catechism. Had I seen this anywhere other than Redeemer, I would almost certainly never have made the connection.