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 | 3 |
| 4 | 44 |
| 5 | 24 |
| 6 | 16 |
| 7 | 4983 |
| 8 | 940 |
| 9 | 300 |
| 10 | 125 |
| 11 | 7565342 |
| 12 | 154770 |
| 13 | 18000 |
| 14 | 4320 |
| 15 | 1296 |
| 16 | 2414249587694 |
| 17 | 318926314 |
| 18 | 3927105 |
| 19 | 363580 |
| 20 | 72030 |
| 21 | 16807 |
| 22 | 56130437054842366160898 |
| 23 | 135200580256336 |
| 24 | 10244647168 |
| 25 | 99187200 |
| 26 | 8028160 |
| 27 | 1376256 |
| 28 | 262144 |