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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 59 |
| 4 | 2454 |
| 5 | 177998 |
| 6 | 36960008 |
| 7 | 7670953632 |
| 8 | 2822399976144 |
| 9 | 1061085324952592 |
| 10 | 598646324654443008 |