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 | 3 |
| 2 | 6 |
| 3 | 6 |
| 4 | 12 |
| 5 | 0 |
| 6 | 18 |
| 7 | 0 |
| 8 | 24 |
| 9 | 0 |
| 10 | 0 |
| 11 | 66 |
| 12 | 72 |
| 13 | 78 |
| 14 | 0 |
| 15 | 30 |
| 16 | 48 |
| 17 | 0 |
| 18 | 252 |
| 19 | 228 |
| 20 | 300 |
| 21 | 42 |
| 22 | 462 |
| 23 | 690 |
| 24 | 720 |
| 25 | 750 |
| 26 | 702 |
| 27 | 810 |
| 28 | 1260 |
| 29 | 2088 |
| 30 | 3870 |
| 31 | 5022 |
| 32 | 5568 |
| 33 | 4752 |
| 34 | 5916 |
| 35 | 10920 |
| 36 | 16416 |
| 37 | 18870 |
| 38 | 21660 |
| 39 | 23556 |
| 40 | 34320 |
| 41 | 51414 |
| 42 | 75852 |
| 43 | 93654 |
| 44 | 108372 |
| 45 | 126360 |
| 46 | 172914 |
| 47 | 245058 |
| 48 | 343872 |