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 | 66 |
| 2 | 2376 |
| 3 | 61776 |
| 4 | 1297296 |
| 5 | 23351328 |
| 6 | 373621248 |
| 7 | 5444195328 |
| 8 | 73496636928 |
| 9 | 930957401088 |
| 10 | 11171488813056 |
| 11 | 127964326404096 |
| 12 | 1407607590445056 |
| 13 | 14942295960109056 |
| 14 | 153692187018264576 |
| 15 | 1536921870182645760 |
| 16 | 14984988234280796160 |
| 17 | 142798123173734645760 |
| 18 | 1332782482954856693760 |