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.
| n | a(n) |
|---|---|
| 16 | 9 |
| 17 | 4 |
| 18 | 6 |
| 19 | 0 |
| 20 | 7 |
| 21 | 3 |
| 22 | 0 |
| 23 | 4 |
| 24 | 7 |
| 25 | 2 |
| 26 | 5 |
| 27 | 8 |
| 28 | 0 |
| 29 | 8 |
| 30 | 0 |
| 31 | 0 |