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 | 31 |
| 4 | 5 |
| 5 | 3221 |
| 6 | 157 |
| 7 | 25646167 |
| 8 | 3833 |
| 9 | 7792003 |
| 10 | 732541 |
| 11 | 150332843 |
| 12 | 144061 |
| 13 | 17615988547 |
| 14 | 6177695707 |
| 15 | 461017351 |
| 16 | 31129845205681 |
| 17 | 361353204962363828785531 |
| 18 | 903870199 |
| 19 | 751410597400064602523400427092397 |
| 20 | 25058741 |
| 21 | 153436090543 |
| 22 | 1750258119644519 |