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 | 1 |
| 3 | 2 |
| 4 | 1 |
| 5 | 9 |
| 6 | 1 |
| 7 | 181 |
| 8 | 1 |
| 9 | 8065 |
| 10 | 1 |
| 11 | 604801 |
| 12 | 1 |
| 13 | 68428801 |
| 14 | 1 |
| 15 | 10897286401 |
| 16 | 1 |
| 17 | 2324754432001 |
| 18 | 1 |
| 19 | 640237370572801 |
| 20 | 1 |
| 21 | 221172909834240001 |
| 22 | 1 |
| 23 | 93666727314800640001 |
| 24 | 1 |
| 25 | 47726800133326110720001 |
| 26 | 1 |
| 27 | 28806532937614688256000001 |
| 28 | 1 |
| 29 | 20325889640780924033433600001 |
| 30 | 1 |
| 31 | 16578303738261941164769280000001 |