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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 5 |
| 5 | 7 |
| 6 | 2 |
| 7 | 4 |
| 8 | 15 |
| 9 | 4 |
| 10 | 2 |
| 11 | 11 |
| 12 | 18 |
| 13 | 14 |
| 14 | 53 |
| 15 | 2 |
| 16 | 54 |
| 17 | 1606 |
| 18 | 482 |
| 19 | 104 |
| 20 | 754 |
| 21 | 536 |