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 | 2 |
| 1 | 2 |
| 2 | 3 |
| 3 | 4 |
| 4 | 25 |
| 5 | 201 |
| 6 | 40201 |
| 7 | 1212060151 |
| 8 | 1305857607493406801 |
| 9 | 1534737681943564047120326770001682121 |
| 10 | 11777098761887521784975815904636471022877972047160405176265171997646882601 |