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 | 12 |
| 3 | 216 |
| 4 | 2700 |
| 5 | 54000 |
| 6 | 1054200 |
| 7 | 20991600 |
| 8 | 445365900 |
| 9 | 9628264800 |
| 10 | 212635396512 |
| 11 | 4790810344320 |
| 12 | 109495671909624 |
| 13 | 2534856710978592 |
| 14 | 59336480231336880 |
| 15 | 1402136110916757216 |
| 16 | 33409975384414912140 |
| 17 | 801962422581013417152 |