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 | 2 |
| 1 | 5 |
| 2 | 32 |
| 3 | 284 |
| 4 | 2960 |
| 5 | 33872 |
| 6 | 411776 |
| 7 | 5221568 |
| 8 | 68299520 |
| 9 | 914858240 |
| 10 | 12486496256 |
| 11 | 173031701504 |
| 12 | 2428066058240 |
| 13 | 34432752275456 |
| 14 | 492697174507520 |
| 15 | 7104716644990976 |
| 16 | 103142445617709056 |
| 17 | 1506248913346691072 |