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 | 1679616 |
| 1 | 1475789056 |
| 2 | 54875873536 |
| 3 | 656100000000 |
| 4 | 4347792138496 |
| 5 | 20047612231936 |
| 6 | 72301961339136 |
| 7 | 218340105584896 |
| 8 | 576480100000000 |
| 9 | 1370114370683136 |
| 10 | 2992179271065856 |
| 11 | 6095689385410816 |
| 12 | 11716593810022656 |