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 | 0 |
| 2 | 1 |
| 3 | 0 |
| 4 | 2 |
| 5 | 8 |
| 6 | 0 |
| 7 | 6 |
| 8 | 48 |
| 9 | 162 |
| 10 | 0 |
| 11 | 24 |
| 12 | 384 |
| 13 | 1944 |
| 14 | 6144 |
| 15 | 0 |
| 16 | 120 |
| 17 | 3840 |
| 18 | 29160 |
| 19 | 122880 |
| 20 | 375000 |
| 21 | 0 |
| 22 | 720 |
| 23 | 46080 |
| 24 | 524880 |
| 25 | 2949120 |
| 26 | 11250000 |
| 27 | 33592320 |
| 28 | 0 |
| 29 | 5040 |
| 30 | 645120 |
| 31 | 11022480 |
| 32 | 82575360 |
| 33 | 393750000 |
| 34 | 1410877440 |
| 35 | 4150656720 |