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 | 48 |
| 1 | 0 |
| 2 | 216 |
| 3 | 588 |
| 4 | -96 |
| 5 | 5832 |
| 6 | 4800 |
| 7 | 13068 |
| 8 | 115776 |
| 9 | 32448 |
| 10 | 664440 |
| 11 | 1736100 |
| 12 | 1757760 |
| 13 | 18387336 |
| 14 | 24467184 |
| 15 | 90326532 |
| 16 | 379958640 |
| 17 | 535402224 |
| 18 | 2924464488 |
| 19 | 7189478184 |
| 20 | 17099776512 |
| 21 | 73614120000 |
| 22 | 153395478288 |
| 23 | 528792612984 |