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 | 2 |
| 1 | 5 |
| 2 | 141 |
| 3 | 68575 |
| 4 | 32089377154 |
| 5 | 1644444237306316731482 |
| 6 | 65593236350142721999718859354569312622907814 |