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 | 6 |
| 1 | 0 |
| 2 | 2 |
| 3 | 12 |
| 4 | 6 |
| 5 | 20 |
| 6 | 50 |
| 7 | 56 |
| 8 | 134 |
| 9 | 264 |
| 10 | 402 |
| 11 | 836 |
| 12 | 1542 |
| 13 | 2652 |
| 14 | 5154 |
| 15 | 9392 |
| 16 | 16902 |
| 17 | 31824 |
| 18 | 58082 |
| 19 | 106172 |
| 20 | 197126 |
| 21 | 360932 |
| 22 | 662994 |
| 23 | 1223784 |
| 24 | 2245766 |
| 25 | 4130520 |
| 26 | 7606770 |
| 27 | 13976436 |
| 28 | 25711622 |
| 29 | 47310252 |
| 30 | 86978370 |
| 31 | 160002656 |
| 32 | 294324230 |
| 33 | 541249952 |