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 | 94 |
| 3 | 66 |
| 4 | 19290 |
| 5 | 2000006490 |
| 6 | 247917529768610 |
| 7 | 276320525457530886869600795810 |