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 | 1 |
| 3 | 7 |
| 4 | 97 |
| 5 | 2911 |
| 6 | 180481 |
| 7 | 22740607 |
| 8 | 5776114177 |
| 9 | 2945818230271 |
| 10 | 3010626231336961 |
| 11 | 6159741269315422207 |
| 12 | 25217980756577338515457 |
| 13 | 206535262396368402441592831 |
| 14 | 3383460668577307168798173757441 |