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) |
|---|---|
| 3 | 1 |
| 4 | 1 |
| 5 | 3 |
| 6 | 4 |
| 7 | 12 |
| 8 | 23 |
| 9 | 47 |
| 10 | 100 |
| 11 | 198 |
| 12 | 404 |
| 13 | 818 |
| 14 | 1652 |
| 15 | 3319 |
| 16 | 6686 |
| 17 | 13426 |
| 18 | 26947 |
| 19 | 54043 |
| 20 | 108331 |
| 21 | 217059 |
| 22 | 434731 |
| 23 | 870472 |
| 24 | 1742558 |
| 25 | 3487710 |
| 26 | 6979593 |
| 27 | 13965902 |
| 28 | 27942597 |
| 29 | 55902624 |
| 30 | 111833288 |
| 31 | 223711791 |
| 32 | 447496476 |
| 33 | 895110536 |
| 34 | 1790410758 |
| 35 | 3581127635 |
| 36 | 7162749398 |