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 | 30 |
| 2 | 825 |
| 3 | 24150 |
| 4 | 775845 |
| 5 | 27478710 |
| 6 | 1069801425 |
| 7 | 45547251750 |
| 8 | 2108878296525 |
| 9 | 105616706545350 |
| 10 | 5693005525232025 |
| 11 | 328784072492625750 |
| 12 | 20261087389388971125 |
| 13 | 1327378299252353097750 |
| 14 | 92142485069345244158625 |
| 15 | 6756933615539839013031750 |
| 16 | 522007423480304780922028125 |