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 | 4 |
| 4 | 6 |
| 5 | 19 |
| 6 | 31 |
| 7 | 73 |
| 8 | 144 |
| 9 | 331 |
| 10 | 672 |
| 11 | 1468 |
| 12 | 3024 |
| 13 | 6065 |
| 14 | 9592 |
| 15 | 19701 |
| 16 | 39630 |
| 17 | 79625 |
| 18 | 157569 |
| 19 | 316139 |
| 20 | 632655 |
| 21 | 1264043 |
| 22 | 2532963 |
| 23 | 5060484 |
| 24 | 10128862 |
| 25 | 20270752 |
| 26 | 40575156 |
| 27 | 81134041 |
| 28 | 162268825 |
| 29 | 324627203 |
| 30 | 649177198 |
| 31 | 1298516271 |
| 32 | 2596827906 |