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 | 0 |
| 2 | 2 |
| 3 | 7 |
| 4 | 5 |
| 5 | 341 |
| 6 | 3 |
| 7 | 55987 |
| 8 | 257 |
| 9 | 46873 |
| 10 | 205 |
| 11 | 11111111111 |
| 12 | 241 |
| 13 | 9726655034461 |
| 14 | 39991 |
| 15 | 14709241 |
| 16 | 16777217 |
| 17 | 19676527011956855057 |
| 18 | 46441 |
| 19 | 41660902667961039785743 |
| 20 | 16519105 |
| 21 | 8177824843189 |
| 22 | 9090909091 |
| 23 | 357686347714896679177439424707 |