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 | 2 |
| 2 | 3 |
| 3 | 31 |
| 4 | 13 |
| 5 | 71 |
| 6 | 31 |
| 7 | 19531 |
| 8 | 313 |
| 9 | 829 |
| 10 | 521 |
| 11 | 12207031 |
| 12 | 601 |
| 13 | 305175781 |
| 14 | 19531 |
| 15 | 1741 |
| 16 | 11489 |
| 17 | 466344409 |
| 18 | 5167 |
| 19 | 3981071 |
| 20 | 9161 |
| 21 | 519499 |
| 22 | 12207031 |
| 23 | 332207361361 |
| 24 | 390001 |
| 25 | 9384251 |
| 26 | 305175781 |
| 27 | 31051 |
| 28 | 234750601 |
| 29 | 22125996444329 |
| 30 | 7621 |