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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 11 |
| 4 | 7 |
| 5 | 27 |
| 6 | 581 |
| 7 | 4583 |
| 8 | 2327 |
| 9 | 69761 |
| 10 | 775643 |
| 11 | 147941 |
| 12 | 30601201 |
| 13 | 30679433 |
| 14 | 10928023 |
| 15 | 6516099439 |
| 16 | 445868889691 |
| 17 | 298288331489 |
| 18 | 7327135996801 |
| 19 | 1029216937671847 |
| 20 | 14361631943741 |
| 21 | 837902013393451 |
| 22 | 2766939485246012129 |
| 23 | 274082602410356881 |
| 24 | 835547516381094139939 |