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 | 8 |
| 3 | 24 |
| 4 | 86 |
| 5 | 90 |
| 6 | 780 |
| 7 | 5940 |
| 8 | 52350 |
| 9 | 278460 |
| 10 | 40768260 |
| 11 | 6847205430 |
| 12 | 5027286840810 |