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 | 2 |
| 2 | 16 |
| 3 | 512 |
| 4 | 5184 |
| 5 | 159588 |
| 6 | 6041764 |
| 7 | 2147569224 |
| 8 | 351791334400 |
| 9 | 528775298642599 |
| 10 | 238297327919927329 |
| 11 | 1643642864931094594560 |