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 | 9 |
| 2 | 144 |
| 3 | 2304 |
| 4 | 36864 |
| 5 | 589824 |
| 6 | 9437184 |
| 7 | 150994944 |
| 8 | 2415919104 |
| 9 | 38654705664 |
| 10 | 618475290624 |
| 11 | 9895604649984 |
| 12 | 158329674399744 |
| 13 | 2533274790395904 |
| 14 | 40532396646334464 |
| 15 | 648518346341351424 |