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 | 1 |
| 3 | 16 |
| 4 | 319 |
| 5 | 8296 |
| 6 | 274089 |
| 7 | 11233692 |
| 8 | 559402687 |
| 9 | 33242527600 |
| 10 | 2321736233953 |
| 11 | 188129440349764 |
| 12 | 17490569477124495 |
| 13 | 1847922212710560936 |
| 14 | 220017711270954521305 |
| 15 | 29303973269720039220172 |
| 16 | 4337667369421168874655487 |
| 17 | 709446302988196094938729696 |