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 | 1 |
| 2 | 2 |
| 3 | 5 |
| 4 | 17 |
| 5 | 13 |
| 6 | 97 |
| 7 | 3077 |
| 8 | 155333 |
| 9 | 147223992353 |
| 10 | 182758163483477540989 |
| 11 | 634072602906397751091977058984828897557 |