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) |
|---|---|
| 2 | 1 |
| 3 | 67 |
| 4 | 2427 |
| 5 | 66579 |
| 6 | 1565371 |
| 7 | 33438451 |
| 8 | 669776139 |
| 9 | 12817737731 |
| 10 | 237180629275 |
| 11 | 4277806868563 |
| 12 | 75628309151275 |
| 13 | 1315968756706339 |
| 14 | 22606389934281147 |
| 15 | 384286142618740851 |
| 16 | 6475978445076745163 |