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 | 4 |
| 2 | 86 |
| 3 | 14178 |
| 4 | 21907055 |
| 5 | 348053502590 |
| 6 | 60704077222861152 |
| 7 | 122233352821430587249163 |
| 8 | 2957950981271006387648141644093 |