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 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 4 |
| 7 | 1 |
| 8 | 6 |
| 9 | 6 |
| 10 | 192 |
| 11 | 1 |
| 12 | 720 |
| 13 | 1 |
| 14 | 23040 |
| 15 | 6480 |
| 16 | 10080 |
| 17 | 1 |
| 18 | 12902400 |
| 19 | 1 |
| 20 | 34836480 |
| 21 | 2449440 |
| 22 | 1857945600 |
| 23 | 1 |
| 24 | 50295168000 |
| 25 | 3000 |
| 26 | 980995276800 |
| 27 | 9797760 |
| 28 | 9564703948800 |
| 29 | 1 |
| 30 | 1518492398911488000 |
| 31 | 1 |
| 32 | 41845579776000 |
| 33 | 1571364748800 |