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 | 22 |
| 2 | 484 |
| 3 | 990 |
| 4 | 2025 |
| 5 | 22995 |
| 6 | 261121 |
| 7 | 768544 |
| 8 | 2262016 |
| 9 | 18608992 |
| 10 | 153091129 |
| 11 | 558232641 |
| 12 | 2035543689 |
| 13 | 13946476806 |
| 14 | 95553937924 |
| 15 | 397367788702 |
| 16 | 1652481969121 |
| 17 | 10150368975235 |
| 18 | 62348632093225 |
| 19 | 281328849436320 |
| 20 | 1269409109197824 |