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 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 0 |
| 4 | 2 |
| 5 | 2 |
| 6 | 0 |
| 7 | 9 |
| 8 | 12 |
| 9 | 6 |
| 10 | 0 |
| 11 | 64 |
| 12 | 96 |
| 13 | 72 |
| 14 | 24 |
| 15 | 0 |
| 16 | 625 |
| 17 | 1000 |
| 18 | 900 |
| 19 | 480 |
| 20 | 120 |
| 21 | 0 |
| 22 | 7776 |
| 23 | 12960 |
| 24 | 12960 |
| 25 | 8640 |
| 26 | 3600 |
| 27 | 720 |
| 28 | 0 |
| 29 | 117649 |
| 30 | 201684 |
| 31 | 216090 |
| 32 | 164640 |
| 33 | 88200 |
| 34 | 30240 |
| 35 | 5040 |
| 36 | 0 |
| 37 | 2097152 |
| 38 | 3670016 |
| 39 | 4128768 |
| 40 | 3440640 |
| 41 | 2150400 |
| 42 | 967680 |
| 43 | 282240 |
| 44 | 40320 |
| 45 | 0 |