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 | 0 |
| 2 | 1 |
| 3 | 3 |
| 4 | 4 |
| 5 | 7 |
| 6 | 16 |
| 7 | 17 |
| 8 | 28 |
| 9 | 70 |
| 10 | 85 |
| 11 | 125 |
| 12 | 392 |
| 13 | 379 |
| 14 | 704 |
| 15 | 3359 |
| 16 | 2248 |
| 17 | 4111 |
| 18 | 18510 |
| 19 | 14309 |
| 20 | 30820 |