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 | 8 |
| 4 | 1 |
| 5 | 48 |
| 6 | 180 |
| 7 | 1 |
| 8 | 160 |
| 9 | 3204 |
| 10 | 8064 |
| 11 | 1 |
| 12 | 400 |
| 13 | 24972 |
| 14 | 311328 |
| 15 | 604800 |
| 16 | 1 |
| 17 | 840 |
| 18 | 125468 |
| 19 | 4654656 |
| 20 | 42454080 |
| 21 | 68428800 |
| 22 | 1 |
| 23 | 1568 |
| 24 | 476728 |
| 25 | 40968960 |
| 26 | 1073980368 |
| 27 | 7803233280 |
| 28 | 10897286400 |
| 29 | 1 |
| 30 | 2688 |
| 31 | 1490328 |
| 32 | 254542720 |
| 33 | 15076235088 |
| 34 | 306406471680 |