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 | 5 |
| 2 | 29 |
| 3 | 179 |
| 4 | 1259 |
| 5 | 10079 |
| 6 | 907199 |
| 7 | 326918591999 |
| 8 | 1600593426431999 |
| 9 | 6463004184721244159999 |