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 | 17 |
| 3 | 0 |
| 4 | 2465 |
| 5 | 43424 |
| 6 | 484785 |
| 7 | 4665320 |
| 8 | 42784577 |
| 9 | 386889048 |
| 10 | 3485784401 |
| 11 | 31379288048 |
| 12 | 282426550497 |
| 13 | 2541861001520 |
| 14 | 22876784925425 |
| 15 | 205891120704024 |
| 16 | 1853020172074625 |
| 17 | 16677181675529000 |
| 18 | 150094635262986897 |