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 | 2 |
| 2 | 59 |
| 3 | 2707 |
| 4 | 54525 |
| 5 | 808650 |
| 6 | 828499 |
| 7 | 17893953 |
| 8 | 22931745 |
| 9 | 1346808619 |
| 10 | 66757797341 |
| 11 | 66757797341 |
| 12 | 1379889220413 |
| 13 | 15170474235886 |