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 | 0 |
| 5 | 232 |
| 6 | 450048 |
| 7 | 163809288 |
| 8 | 27306899520 |
| 9 | 2898916824320 |
| 10 | 230479103253264 |
| 11 | 15045786224718576 |
| 12 | 853790829031070016 |
| 13 | 43726349865720132216 |
| 14 | 2073954076439134340896 |
| 15 | 92786533933117718314680 |
| 16 | 3968339124661862533557120 |
| 17 | 163867469809854783921566544 |