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) |
|---|---|
| 2 | 36 |
| 3 | 2610 |
| 4 | 129800 |
| 5 | 5748750 |
| 6 | 241987500 |
| 7 | 9885006250 |
| 8 | 395426250000 |
| 9 | 15570077343750 |
| 10 | 605504070312500 |
| 11 | 23311913238281250 |
| 12 | 890091272109375000 |
| 13 | 33749294301074218750 |
| 14 | 1272088786561523437500 |
| 15 | 47703329503967285156250 |
| 16 | 1780924301526757812500000 |
| 17 | 66228122463283630371093750 |