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 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 6 |
| 6 | 19 |
| 7 | 23 |
| 8 | 63 |
| 9 | 76 |
| 10 | 508 |
| 11 | 561 |
| 12 | 839 |
| 13 | 894 |
| 14 | 1389 |
| 15 | 2513 |
| 16 | 3436 |
| 17 | 6121 |
| 18 | 7412 |
| 19 | 8418 |
| 20 | 9184 |