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 | 6 |
| 2 | 18 |
| 3 | 48 |
| 4 | 126 |
| 5 | 300 |
| 6 | 762 |
| 7 | 1668 |
| 8 | 4216 |
| 9 | 8668 |
| 10 | 21988 |
| 11 | 43058 |
| 12 | 110832 |
| 13 | 202432 |
| 14 | 561020 |
| 15 | 875382 |
| 16 | 2881286 |
| 17 | 3501056 |