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 | 4 |
| 1 | 3 |
| 2 | 6 |
| 3 | 12 |
| 4 | 51 |
| 5 | 146 |
| 6 | 280 |
| 7 | 482 |
| 8 | 687 |
| 9 | 3825 |
| 10 | 5646 |
| 11 | 30904 |
| 12 | 120121 |
| 13 | 1344923 |
| 14 | 2340376 |
| 15 | 4456271 |
| 16 | 194324055 |
| 17 | 219784933 |
| 18 | 976224357 |
| 19 | 11584437417 |
| 20 | 26402463827 |
| 21 | 34635051144 |
| 22 | 85031207055 |
| 23 | 95014277980 |
| 24 | 257962314442 |