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 | 16 |
| 3 | 306 |
| 4 | 6321 |
| 5 | 136311 |
| 6 | 3021276 |
| 7 | 68250216 |
| 8 | 1563397131 |
| 9 | 36195839771 |
| 10 | 845073322136 |
| 11 | 19864512260726 |
| 12 | 469561887175791 |
| 13 | 11151848709622581 |
| 14 | 265910204875935096 |
| 15 | 6362320059617532336 |
| 16 | 152684022853771521426 |