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 | 2 |
| 2 | 3 |
| 3 | 7 |
| 4 | 5 |
| 5 | 11 |
| 6 | 110 |
| 7 | 71 |
| 8 | 722 |
| 9 | 359 |
| 10 | 329902 |
| 11 | 39916801 |
| 12 | 2834342 |
| 13 | 75024430 |
| 14 | 3790360510 |
| 15 | 46271879 |
| 16 | 1059865 |
| 17 | 1538931 |
| 18 | 123611150 |
| 19 | 1713311273363902 |
| 20 | 117897322430 |
| 21 | 2703876255255 |
| 22 | 93799610095770191 |
| 23 | 148139754736864717 |