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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 8 |
| 5 | 12 |
| 6 | 144 |
| 7 | 56 |
| 8 | 8064 |
| 9 | 36288 |
| 10 | 48384 |
| 11 | 798336 |
| 12 | 19160064 |
| 13 | 41513472 |
| 14 | 3487131648 |
| 15 | 5230697472 |
| 16 | 6199345152 |
| 17 | 1422749712384 |
| 18 | 51218989645824 |
| 19 | 162193467211776 |
| 20 | 3892643213082624 |
| 21 | 3144057979797504 |
| 22 | 599467054814724096 |