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 | 1 |
| 2 | 275 |
| 3 | 11925 |
| 4 | 208624 |
| 5 | 2078375 |
| 6 | 14118201 |
| 7 | 72758875 |
| 8 | 304553600 |
| 9 | 1084203549 |
| 10 | 3390961375 |
| 11 | 9540835601 |
| 12 | 24582546000 |
| 13 | 58801331875 |
| 14 | 131987718149 |
| 15 | 280410672375 |
| 16 | 567799960576 |
| 17 | 1102105900025 |
| 18 | 2060382328875 |
| 19 | 3724847929549 |
| 20 | 6534040766000 |
| 21 | 11154010982751 |
| 22 | 18575718271825 |