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 | 8 |
| 1 | 36 |
| 2 | 168 |
| 3 | 786 |
| 4 | 3660 |
| 5 | 16866 |
| 6 | 76752 |
| 7 | 343914 |
| 8 | 1514724 |
| 9 | 6543066 |
| 10 | 27699960 |
| 11 | 114793386 |
| 12 | 466078116 |
| 13 | 1854554490 |
| 14 | 7248419496 |
| 15 | 27869755866 |
| 16 | 105687130980 |
| 17 | 395978680266 |
| 18 | 1468425404328 |
| 19 | 5396913313866 |
| 20 | 19675676962308 |
| 21 | 71219609783946 |
| 22 | 256052236665192 |
| 23 | 914773982356902 |