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) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 7 |
| 4 | 10 |
| 5 | 25 |
| 6 | 147 |
| 7 | 218 |
| 8 | 446 |
| 9 | 551 |
| 10 | 5960 |
| 11 | 14252 |
| 12 | 63337 |
| 13 | 118472 |
| 14 | 183457 |
| 15 | 951700 |
| 16 | 3458334 |
| 17 | 6284060 |
| 18 | 2581691 |
| 19 | 80743228 |
| 20 | 259753425 |