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 | 5 |
| 2 | 17 |
| 3 | 89 |
| 4 | 521 |
| 5 | 4253 |
| 6 | 9689 |
| 7 | 9941 |
| 8 | 11213 |
| 9 | 19937 |
| 10 | 21701 |
| 11 | 859433 |
| 12 | 1398269 |
| 13 | 2976221 |
| 14 | 3021377 |
| 15 | 6972593 |
| 16 | 32582657 |
| 17 | 43112609 |
| 18 | 57885161 |