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 | 3 |
| 3 | 4 |
| 4 | 21 |
| 5 | 6 |
| 6 | 346 |
| 7 | 8 |
| 8 | 4617 |
| 9 | 13132 |
| 10 | 80696 |
| 11 | 12 |
| 12 | 4903847 |
| 13 | 14 |
| 14 | 40410966 |
| 15 | 756336736 |
| 16 | 2416181265 |
| 17 | 18 |
| 18 | 306560794753 |
| 19 | 20 |
| 20 | 6941876836216 |
| 21 | 132964265599502 |
| 22 | 34522735212626 |
| 23 | 24 |
| 24 | 116720277621236637 |
| 25 | 33378601074218776 |
| 26 | 51185893450298400 |
| 27 | 60788365423272068968 |