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 | 3 |
| 3 | 21 |
| 4 | 33 |
| 5 | 1083 |
| 6 | 2541 |
| 7 | 51282 |
| 8 | 51282 |
| 9 | 1296060612 |
| 10 | 43449172767 |
| 11 | 189324538095 |