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 | 6 |
| 4 | 12 |
| 5 | 60 |
| 6 | 120 |
| 7 | 840 |
| 8 | 7560 |
| 9 | 15120 |
| 10 | 110880 |
| 11 | 166320 |
| 12 | 1441440 |
| 13 | 2882880 |
| 14 | 10810800 |
| 15 | 43243200 |
| 16 | 183783600 |
| 17 | 367567200 |
| 18 | 2793510720 |
| 19 | 6983776800 |
| 20 | 58663725120 |
| 21 | 117327450240 |
| 22 | 299836817280 |
| 23 | 2698531355520 |
| 24 | 7495920432000 |