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 | 2 |
| 3 | 5 |
| 4 | 124 |
| 5 | 181 |
| 6 | 696 |
| 7 | 261800 |
| 8 | 3834909 |
| 9 | 18836480 |
| 10 | 51432542 |
| 11 | 69709961 |
| 12 | 332054520 |
| 13 | 3140421767 |