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 | 6 |
| 4 | 9 |
| 5 | 24 |
| 6 | 146 |
| 7 | 217 |
| 8 | 445 |
| 9 | 550 |
| 10 | 5959 |
| 11 | 14251 |
| 12 | 63336 |
| 13 | 118471 |
| 14 | 183456 |
| 15 | 951699 |
| 16 | 3458333 |
| 17 | 6284059 |
| 18 | 2581690 |
| 19 | 80743227 |
| 20 | 259753424 |