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 | 1 |
| 2 | 6 |
| 3 | 41 |
| 4 | 331 |
| 5 | 3176 |
| 6 | 35451 |
| 7 | 447981 |
| 8 | 6282416 |
| 9 | 96546231 |
| 10 | 1611270851 |
| 11 | 28985293526 |
| 12 | 558413253581 |
| 13 | 11458179765541 |
| 14 | 249255304141006 |
| 15 | 5725640423174901 |
| 16 | 138407987170952351 |
| 17 | 3510263847256823056 |