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 | 4 |
| 2 | 8 |
| 3 | 49 |
| 4 | 3952 |
| 5 | 117175 |
| 6 | 2322232 |
| 7 | 2437094 |
| 8 | 15449349 |
| 9 | 438134200 |
| 10 | 1605609902 |
| 11 | 85678432036 |
| 12 | 132891678661 |
| 13 | 8415592788756 |