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) |
|---|---|
| 7 | 1 |
| 8 | 56 |
| 9 | 1764 |
| 10 | 41160 |
| 11 | 792330 |
| 12 | 13311144 |
| 13 | 201885684 |
| 14 | 2826399576 |
| 15 | 37096494435 |
| 16 | 461645264080 |
| 17 | 5493578642552 |
| 18 | 62926446269232 |
| 19 | 697434779483988 |
| 20 | 7510836086750640 |
| 21 | 78863778910881720 |
| 22 | 809668130151718992 |
| 23 | 8147285559651672357 |
| 24 | 80514351413028291528 |
| 25 | 782778416515552834300 |