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 | 0 |
| 2 | 18 |
| 3 | 48 |
| 4 | 12 |
| 5 | 20 |
| 6 | 0 |
| 7 | 112 |
| 8 | 1800 |
| 9 | 45 |
| 10 | 90 |
| 11 | 2475 |
| 12 | 48 |
| 13 | 5005 |
| 14 | 140 |
| 15 | 30 |
| 16 | 24 |
| 17 | 69632 |
| 18 | 90 |
| 19 | 235144 |
| 20 | 60 |
| 21 | 750 |
| 22 | 4950 |