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 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 6 |
| 4 | 24 |
| 5 | 44 |
| 6 | 80 |
| 7 | 144 |
| 8 | 264 |
| 9 | 484 |
| 10 | 888 |
| 11 | 1632 |
| 12 | 3000 |
| 13 | 5516 |
| 14 | 10144 |
| 15 | 18656 |
| 16 | 34312 |
| 17 | 63108 |
| 18 | 116072 |
| 19 | 213488 |
| 20 | 392664 |
| 21 | 722220 |
| 22 | 1328368 |
| 23 | 2443248 |
| 24 | 4493832 |
| 25 | 8265444 |
| 26 | 15202520 |
| 27 | 27961792 |
| 28 | 51429752 |
| 29 | 94594060 |
| 30 | 173985600 |
| 31 | 320009408 |
| 32 | 588589064 |
| 33 | 1082584068 |
| 34 | 1991182536 |