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 | 2 |
| 4 | 3 |
| 5 | 4 |
| 6 | 7 |
| 7 | 8 |
| 8 | 44 |
| 9 | 135 |
| 10 | 141 |
| 11 | 157 |
| 12 | 242 |
| 13 | 922 |
| 14 | 1234 |
| 15 | 2195 |
| 16 | 4649 |
| 17 | 6118 |
| 18 | 7323 |
| 19 | 9542 |
| 20 | 13493 |
| 21 | 20309 |
| 22 | 20359 |
| 23 | 232919 |
| 24 | 830864 |
| 25 | 902707 |