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 | 2 |
| 2 | 24 |
| 3 | 254 |
| 4 | 2508 |
| 5 | 25015 |
| 6 | 250014 |
| 7 | 2500283 |
| 8 | 25000402 |
| 9 | 250002505 |
| 10 | 2500005319 |
| 11 | 25000014226 |
| 12 | 250000051446 |