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 | 0 |
| 3 | 2 |
| 4 | 4 |
| 5 | 0 |
| 6 | 16 |
| 7 | 0 |
| 8 | 4 |
| 9 | 80 |
| 10 | 192 |
| 11 | 216 |
| 12 | 128 |
| 13 | 96 |
| 14 | 0 |
| 15 | 8 |
| 16 | 4752 |
| 17 | 10752 |
| 18 | 11776 |
| 19 | 7680 |
| 20 | 3936 |
| 21 | 1024 |
| 22 | 384 |
| 23 | 0 |
| 24 | 16 |
| 25 | 440192 |
| 26 | 975360 |
| 27 | 1035680 |
| 28 | 696320 |
| 29 | 329600 |
| 30 | 114176 |
| 31 | 31040 |
| 32 | 5120 |
| 33 | 1280 |
| 34 | 0 |
| 35 | 32 |
| 36 | 59245120 |
| 37 | 129054720 |
| 38 | 135477504 |
| 39 | 90798080 |