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 | 12 |
| 2 | 432 |
| 3 | 15552 |
| 4 | 559872 |
| 5 | 20155392 |
| 6 | 725594112 |
| 7 | 26121388032 |
| 8 | 940369969152 |
| 9 | 33853318889472 |
| 10 | 1218719480020992 |
| 11 | 43873901280755712 |
| 12 | 1579460446107205632 |
| 13 | 56860576059859402752 |
| 14 | 2046980738154938499072 |
| 15 | 73691306573577785966592 |