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 | 1 |
| 1 | 7 |
| 2 | 105 |
| 3 | 1575 |
| 4 | 23625 |
| 5 | 354375 |
| 6 | 5315625 |
| 7 | 79734375 |
| 8 | 1196015625 |
| 9 | 17940234375 |
| 10 | 269103515625 |
| 11 | 4036552734375 |
| 12 | 60548291015625 |
| 13 | 908224365234375 |
| 14 | 13623365478515625 |
| 15 | 204350482177734375 |
| 16 | 3065257232666015625 |