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 | 6 |
| 4 | 12 |
| 5 | 72 |
| 6 | 72 |
| 7 | 864 |
| 8 | 1728 |
| 9 | 13824 |
| 10 | 22032 |
| 11 | 555264 |
| 12 | 476928 |
| 13 | 17625600 |
| 14 | 29599488 |
| 15 | 321115392 |
| 16 | 805146624 |
| 17 | 46097049600 |
| 18 | 36481536000 |
| 19 | 2754120268800 |
| 20 | 3661604352000 |
| 21 | 83905105305600 |
| 22 | 192859121664000 |
| 23 | 20092043520000000 |
| 24 | 15074060547686400 |
| 25 | 1342354557616128000 |