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 | 3 |
| 3 | 14 |
| 4 | 585 |
| 5 | 924 |
| 6 | 1339975 |
| 7 | 164604 |
| 8 | 14454403425 |
| 9 | 1163340147200 |
| 10 | 478015854767451 |
| 11 | 33644021190 |
| 12 | 37947924636264267625 |
| 13 | 29447897812956 |
| 14 | 6178966019176767549393375 |
| 15 | 1575167029892595726671372288 |