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) |
|---|---|
| 2 | 2 |
| 3 | 3 |
| 4 | 5 |
| 5 | 7 |
| 6 | 17 |
| 7 | 67 |
| 8 | 137 |
| 9 | 23 |
| 10 | 61 |
| 11 | 71 |
| 12 | 401 |
| 13 | 1907 |
| 14 | 661 |
| 15 | 12227 |
| 16 | 29873 |
| 17 | 96731 |
| 18 | 99721 |
| 19 | 154243 |
| 20 | 480209 |
| 21 | 3408707 |
| 22 | 1738901 |
| 23 | 27341387 |