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 | 91 |
| 2 | 10038 |
| 3 | 1467290 |
| 4 | 281838271 |
| 5 | 69542401565 |
| 6 | 21540814788284 |
| 7 | 8205391883388996 |
| 8 | 3775954944255499341 |
| 9 | 2067250635545212529775 |
| 10 | 1328812758711335378653074 |
| 11 | 991440081612864413673579774 |
| 12 | 850081840027433295638565899691 |
| 13 | 830293567537520120294141671187025 |