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 | 49 |
| 3 | 486 |
| 4 | 5537 |
| 5 | 55924 |
| 6 | 523665 |
| 7 | 4766162 |
| 8 | 43013953 |
| 9 | 387361440 |
| 10 | 3486684401 |
| 11 | 31380898558 |
| 12 | 282429287649 |
| 13 | 2541865457036 |
| 14 | 22876791917137 |
| 15 | 205891131335274 |
| 16 | 1853020187803265 |
| 17 | 16677181698246712 |
| 18 | 150094635295109553 |