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 | 21 |
| 2 | 1632 |
| 3 | 68613 |
| 4 | 3019079 |
| 5 | 136204120 |
| 6 | 6093564449 |
| 7 | 272714953724 |
| 8 | 12210363190599 |
| 9 | 546643613178667 |
| 10 | 24472619590752067 |
| 11 | 1095614774297460793 |
| 12 | 49049522462925007446 |
| 13 | 2195896628441171409216 |
| 14 | 98308031733968098712078 |