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 | 6 |
| 3 | 49 |
| 4 | 376 |
| 5 | 3294 |
| 6 | 29928 |
| 7 | 278411 |
| 8 | 2632758 |
| 9 | 25154060 |
| 10 | 241882509 |
| 11 | 2335807857 |
| 12 | 22635291815 |
| 13 | 219935518608 |