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 | 0 |
| 2 | 2 |
| 3 | 1478 |
| 4 | 50726 |
| 5 | 573797 |
| 6 | 3581924 |
| 7 | 15516804 |
| 8 | 52550366 |
| 9 | 149162199 |
| 10 | 370817854 |
| 11 | 831571604 |
| 12 | 1717417198 |
| 13 | 3316210152 |
| 14 | 6054985120 |
| 15 | 10545491888 |
| 16 | 17638773534 |
| 17 | 28489610297 |
| 18 | 44631652698 |
| 19 | 68064067456 |
| 20 | 101350519742 |
| 21 | 147731315314 |
| 22 | 211249526076 |
| 23 | 296891922604 |
| 24 | 410745537182 |