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 | 1 |
| 1 | 3 |
| 2 | 9 |
| 3 | 756 |
| 4 | 6642 |
| 5 | 118341 |
| 6 | 388484100 |
| 7 | 10474704297 |
| 8 | 564988219686 |
| 9 | 22878342156600 |
| 10 | 12158489037532504050 |
| 11 | 984798697643349485688 |
| 12 | 159533936817604246934415 |
| 13 | 19383278088136495245171156 |
| 14 | 2616739259326831261950662430 |
| 15 | 608267042060342812170824926328855679 |