An integer n such that 3n^3 contains three consecutive 3s in its decimal representation is called a super-3 number. The first few super-3 numbers are 261, 462, 471, 481, 558, 753, 1036, ... (OEIS A014569). A. Anderson has shown that all numbers ending in 471, 4710, or 47100 are super-3. In general, a super-d number is a number n such that d n^d contains d ds in its decimal representation. The following table gives the first few super-d numbers for small d.