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) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 1056 |
| 3 | 88938 |
| 4 | 2099200 |
| 5 | 24421875 |
| 6 | 181421856 |
| 7 | 988722196 |
| 8 | 4295098368 |
| 9 | 15690795525 |
| 10 | 50000500000 |
| 11 | 142656721086 |
| 12 | 371505678336 |
| 13 | 896082610423 |
| 14 | 2024786349600 |
| 15 | 4324883625000 |
| 16 | 8796101410816 |
| 17 | 17135960222601 |