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 | 4 |
| 3 | 1 |
| 4 | 12 |
| 5 | 12 |
| 6 | 1 |
| 7 | 24 |
| 8 | 96 |
| 9 | 24 |
| 10 | 1 |
| 11 | 24 |
| 12 | 600 |
| 13 | 360 |
| 14 | 40 |
| 15 | 1 |
| 16 | 0 |
| 17 | 3024 |
| 18 | 4200 |
| 19 | 960 |
| 20 | 60 |
| 21 | 1 |
| 22 | 0 |
| 23 | 12096 |
| 24 | 40824 |
| 25 | 17640 |
| 26 | 2100 |
| 27 | 84 |
| 28 | 1 |
| 29 | 0 |
| 30 | 36288 |
| 31 | 338688 |
| 32 | 270144 |
| 33 | 55440 |
| 34 | 4032 |
| 35 | 112 |
| 36 | 1 |
| 37 | 0 |
| 38 | 72576 |
| 39 | 2407104 |
| 40 | 3580416 |
| 41 | 1212624 |
| 42 | 144144 |
| 43 | 7056 |
| 44 | 144 |
| 45 | 1 |
| 46 | 0 |
| 47 | 72576 |
| 48 | 14515200 |
| 49 | 41791680 |