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 | 8 |
| 2 | 47 |
| 3 | 238 |
| 4 | 1101 |
| 5 | 4788 |
| 6 | 19899 |
| 7 | 79866 |
| 8 | 311769 |
| 9 | 1189728 |
| 10 | 4454919 |
| 11 | 16415622 |
| 12 | 59659173 |
| 13 | 214229772 |
| 14 | 761200659 |
| 15 | 2679525522 |
| 16 | 9353893041 |
| 17 | 32409397944 |
| 18 | 111534054111 |
| 19 | 381480041502 |
| 20 | 1297471217661 |
| 21 | 4390248981348 |
| 22 | 14785128121707 |