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 | 8 |
| 3 | 112 |
| 4 | 2350 |
| 5 | 67526 |
| 6 | 2514688 |
| 7 | 117239888 |
| 8 | 6756599164 |
| 9 | 509020241244 |
| 10 | 72817721736544 |
| 11 | 41583904069469312 |