Mathematical vanity plates
In this charming article Donald E. Knuth looks at automotive license plates and their relationship to mathematics. Some simply state ``Do Math'' or ``Math Sci''. Others display large enough numbers which the author finds remarkable in a mathematical sense. He concludes with ``one of the main unresolved problems'': ``determine the integers of 5 to 8 digits that are most `interesting' in some reasonably mathematical sense''.
scientific article; zbMATH DE number 5897299