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) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 46 |
| 4 | 551 |
| 5 | 5834 |
| 6 | 58667 |
| 7 | 552131 |
| 8 | 5006366 |
| 9 | 44940852 |
| 10 | 404204977 |
| 11 | 3663002302 |
| 12 | 33489857205 |
| 13 | 308457624821 |
| 14 | 2858876213963 |
| 15 | 26639628671867 |
| 16 | 249393770611256 |
| 17 | 2344318816620308 |
| 18 | 22116397130086627 |
| 19 | 209317712988603747 |