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 | 1 |
| 2 | 16 |
| 3 | 111 |
| 4 | 576 |
| 5 | 2631 |
| 6 | 11292 |
| 7 | 46927 |
| 8 | 191680 |
| 9 | 775599 |
| 10 | 3122076 |
| 11 | 12531591 |
| 12 | 50220912 |
| 13 | 201088855 |
| 14 | 804798268 |
| 15 | 3220143903 |
| 16 | 12882607872 |
| 17 | 51534757599 |
| 18 | 206148206268 |
| 19 | 824612224663 |
| 20 | 3298489794160 |
| 21 | 13194045161031 |
| 22 | 52776361000476 |