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 | 3 |
| 2 | 2 |
| 3 | 3 |
| 4 | 97 |
| 5 | 241 |
| 6 | 241 |
| 7 | 1201 |
| 8 | 3361 |
| 9 | 5569 |
| 10 | 61441 |
| 11 | 240769 |
| 12 | 915049 |
| 13 | 240769 |
| 14 | 17302321 |
| 15 | 7076521 |
| 16 | 49186201 |
| 17 | 2100735289 |
| 18 | 1074527281 |
| 19 | 23971813321 |
| 20 | 32354445841 |
| 21 | 68820869329 |
| 22 | 2992426816129 |
| 23 | 26238323995129 |
| 24 | 104071698229321 |