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 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 4 |
| 4 | 10 |
| 5 | 21 |
| 6 | 41 |
| 7 | 78 |
| 8 | 148 |
| 9 | 282 |
| 10 | 537 |
| 11 | 1013 |
| 12 | 1882 |
| 13 | 3446 |
| 14 | 6267 |
| 15 | 11468 |
| 16 | 21416 |
| 17 | 41209 |
| 18 | 81771 |
| 19 | 166042 |
| 20 | 340994 |
| 21 | 700570 |
| 22 | 1429375 |
| 23 | 2886777 |
| 24 | 5771828 |
| 25 | 11453105 |
| 26 | 22638215 |
| 27 | 44742141 |
| 28 | 88681674 |
| 29 | 176545766 |
| 30 | 352992931 |
| 31 | 707922077 |
| 32 | 1421120880 |
| 33 | 2849433326 |