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 | 8 |
| 2 | 77 |
| 3 | 720 |
| 4 | 6545 |
| 5 | 59024 |
| 6 | 531405 |
| 7 | 4782920 |
| 8 | 43046657 |
| 9 | 387420408 |
| 10 | 3486784301 |
| 11 | 31381059488 |
| 12 | 282429536337 |
| 13 | 2541865828160 |
| 14 | 22876792454765 |
| 15 | 205891132094424 |
| 16 | 1853020188851585 |
| 17 | 16677181699666280 |
| 18 | 150094635296998797 |