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 | 1 |
| 2 | 2 |
| 3 | 2 |
| 4 | 99 |
| 5 | 12204 |
| 6 | 249462465 |
| 7 | 93524017020207705 |
| 8 | 8528549813750403709101762452858246 |
| 9 | 70071914165301390868341700110703069865385640933927590404095892463912 |