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 | 1 |
| 3 | 1 |
| 4 | 23548 |
| 5 | 1 |
| 6 | 1 |
| 7 | 21707972 |
| 8 | 21707972 |
| 9 | 1 |
| 10 | 1 |
| 11 | 10708911188 |
| 12 | 743288515164 |
| 13 | 10708911188 |
| 14 | 1 |
| 15 | 1 |
| 16 | 4261002128223 |
| 17 | 6453703025399873 |
| 18 | 6453703025399873 |
| 19 | 4261002128223 |
| 20 | 1 |
| 21 | 1 |
| 22 | 1556000598766224 |
| 23 | 30920009116692763140 |
| 24 | 527896878148304296900 |
| 25 | 30920009116692763140 |