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) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 2 |
| 5 | 7 |
| 6 | 8 |
| 7 | 4 |
| 8 | 19 |
| 9 | 49 |
| 10 | 67 |
| 11 | 42 |
| 12 | 84 |
| 13 | 138 |
| 14 | 174 |
| 15 | 357 |
| 16 | 168 |
| 17 | 348 |
| 18 | 372 |
| 19 | 702 |
| 20 | 906 |
| 21 | 1407 |