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 | 10 |
| 3 | 102 |
| 4 | 3452 |
| 5 | 24365 |
| 6 | 123654 |
| 7 | 7836542 |
| 8 | 38165472 |
| 9 | 381654720 |
| 10 | 3816547290 |