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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 17 |
| 4 | 83525 |
| 5 | 48670514501156640914 |
| 6 | 5611303368570568119463158581109807779153712597124269146443734128560476495542441 |