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 | 6 |
| 2 | 31 |
| 3 | 931 |
| 4 | 865831 |
| 5 | 749662454731 |
| 6 | 561993796032558961827631 |
| 7 | 315837026779085485103718410756049100028793244531 |