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 | 1 |
| 2 | 5 |
| 3 | 65 |
| 4 | 1365 |
| 5 | 39585 |
| 6 | 1464645 |
| 7 | 65909025 |
| 8 | 3493178325 |
| 9 | 213083877825 |
| 10 | 14702787569925 |
| 11 | 1132114642884225 |
| 12 | 96229744645159125 |
| 13 | 8949366251999798625 |
| 14 | 903885991451979661125 |
| 15 | 98523573068265783062625 |
| 16 | 11527258048987096618327125 |
| 17 | 1440907256123387077290890625 |