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 | 64 |
| 4 | 1650 |
| 5 | 66731 |
| 6 | 3968777 |
| 7 | 323676148 |
| 8 | 34890266414 |
| 9 | 4780256317586 |
| 10 | 814873637329516 |
| 11 | 168491370685328792 |