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 | 5 |
| 6 | 17 |
| 7 | 42 |
| 8 | 43 |
| 9 | 138 |
| 10 | 125 |
| 11 | 220 |
| 12 | 33 |
| 13 | 387 |
| 14 | 1766 |
| 15 | 3269 |
| 16 | 7014 |
| 17 | 1398 |
| 18 | 1399 |
| 19 | 1958 |
| 20 | 19143 |
| 21 | 30759 |