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) |
|---|---|
| 2 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 7 |
| 6 | 8 |
| 7 | 15 |
| 8 | 24 |
| 9 | 60 |
| 10 | 168 |
| 11 | 480 |
| 12 | 1512 |
| 13 | 3360 |
| 14 | 12096 |
| 15 | 28448 |
| 16 | 64512 |
| 17 | 163760 |
| 18 | 401760 |
| 19 | 991872 |
| 20 | 2399040 |
| 21 | 6858000 |
| 22 | 13999104 |
| 23 | 32752000 |
| 24 | 69400800 |
| 25 | 172186560 |
| 26 | 517867392 |
| 27 | 1666990080 |
| 28 | 5662137600 |
| 29 | 14475575296 |
| 30 | 33946612000 |
| 31 | 73359820800 |
| 32 | 158022774000 |