A228006 Smallest composite numbers with multiplicative digital root value 0 <= n <= 9.
10, 111, 12, 1113, 4, 15, 6, 117, 8, 9
Offset: 0
This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.