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 | 5 |
| 4 | 8 |
| 5 | 47 |
| 6 | 422 |
| 7 | 1625 |
| 8 | 14431 |
| 9 | 174215 |
| 10 | 1344400 |
| 11 | 9453914 |
| 12 | 132314974 |
| 13 | 990261166 |
| 14 | 10342102148 |
| 15 | 139753036064 |
| 16 | 1847657514232 |