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 | 0 |
| 6 | 716 |
| 7 | 6030140 |
| 8 | 6727188848 |
| 9 | 2898916824320 |
| 10 | 713977455470200 |
| 11 | 121976270685699352 |
| 12 | 16151017610840330800 |
| 13 | 1776999565259831468176 |
| 14 | 170177528415687895764196 |
| 15 | 14652450038892876986833140 |
| 16 | 1161079239300986084649361440 |
| 17 | 86154881092488160155801056400 |