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 | 2 |
| 3 | 6 |
| 4 | 42 |
| 5 | 104 |
| 6 | 120 |
| 7 | 165 |
| 8 | 245 |
| 9 | 272 |
| 10 | 561 |
| 11 | 1806 |
| 12 | 47058 |
| 13 | 765625 |
| 14 | 1137501 |
| 15 | 3874128 |
| 16 | 9131793 |
| 17 | 2214502422 |
| 18 | 52495396602 |