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 | 3 |
| 2 | 8 |
| 3 | 24 |
| 4 | 63 |
| 5 | 168 |
| 6 | 440 |
| 7 | 1155 |
| 8 | 3024 |
| 9 | 7920 |
| 10 | 20735 |
| 11 | 54288 |
| 12 | 142128 |
| 13 | 372099 |
| 14 | 974168 |
| 15 | 2550408 |
| 16 | 6677055 |
| 17 | 17480760 |
| 18 | 45765224 |
| 19 | 119814915 |
| 20 | 313679520 |
| 21 | 821223648 |
| 22 | 2149991423 |
| 23 | 5628750624 |
| 24 | 14736260448 |
| 25 | 38580030723 |
| 26 | 101003831720 |