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 | 33 |
| 3 | 408 |
| 4 | 7360 |
| 5 | 131400 |
| 6 | 2510632 |
| 7 | 50991416 |
| 8 | 1103346172 |
| 9 | 25248402996 |
| 10 | 604074338460 |