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 | 12 |
| 4 | 8 |
| 5 | 1 |
| 6 | 72 |
| 7 | 528 |
| 8 | 704 |
| 9 | 180 |
| 10 | 1 |
| 11 | 324 |
| 12 | 8760 |
| 13 | 53792 |
| 14 | 98124 |
| 15 | 56160 |
| 16 | 8064 |
| 17 | 1 |
| 18 | 1344 |
| 19 | 103040 |
| 20 | 1759520 |
| 21 | 9936360 |
| 22 | 21676144 |
| 23 | 19083456 |
| 24 | 6356160 |
| 25 | 604800 |
| 26 | 1 |
| 27 | 5436 |
| 28 | 1054056 |
| 29 | 41312704 |
| 30 | 539233128 |
| 31 | 2901894144 |
| 32 | 7118351104 |
| 33 | 8247838464 |
| 34 | 4418632656 |
| 35 | 988952832 |
| 36 | 68428800 |
| 37 | 1 |
| 38 | 21816 |
| 39 | 10106736 |
| 40 | 823376896 |
| 41 | 21574613676 |
| 42 | 235937470944 |
| 43 | 1230387808384 |
| 44 | 3281254260864 |
| 45 | 4608240745104 |
| 46 | 3390175943424 |
| 47 | 1247151098880 |
| 48 | 204083712000 |
| 49 | 10897286400 |