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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 8 |
| 5 | 0 |
| 6 | 72 |
| 7 | 0 |
| 8 | 120 |
| 9 | 27 |
| 10 | 180 |
| 11 | 0 |
| 12 | 1400 |
| 13 | 0 |
| 14 | 336 |
| 15 | 360 |
| 16 | 1240 |
| 17 | 0 |
| 18 | 3285 |
| 19 | 0 |
| 20 | 3948 |
| 21 | 672 |
| 22 | 792 |
| 23 | 0 |
| 24 | 15960 |
| 25 | 125 |
| 26 | 1092 |
| 27 | 1080 |
| 28 | 8240 |
| 29 | 0 |
| 30 | 25992 |
| 31 | 0 |
| 32 | 11160 |
| 33 | 1584 |
| 34 | 1836 |
| 35 | 1680 |
| 36 | 57065 |
| 37 | 0 |
| 38 | 2280 |
| 39 | 2184 |
| 40 | 46620 |
| 41 | 0 |
| 42 | 56352 |
| 43 | 0 |
| 44 | 23592 |
| 45 | 18612 |
| 46 | 3312 |
| 47 | 0 |
| 48 | 150040 |
| 49 | 343 |
| 50 | 29955 |
| 51 | 3672 |