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 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 14 |
| 5 | 170 |
| 6 | 183 |
| 7 | 2198 |
| 8 | 2380 |
| 9 | 28562 |
| 10 | 28731 |
| 11 | 30772 |
| 12 | 371294 |
| 13 | 373660 |
| 14 | 399868 |
| 15 | 4826810 |
| 16 | 4829007 |
| 17 | 4855540 |
| 18 | 5198116 |
| 19 | 62748518 |
| 20 | 62779276 |
| 21 | 63119980 |
| 22 | 67575340 |
| 23 | 815730722 |
| 24 | 815759283 |
| 25 | 816104212 |
| 26 | 820557700 |
| 27 | 878479252 |