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 | 256 |
| 1 | 1679616 |
| 2 | 100000000 |
| 3 | 1475789056 |
| 4 | 11019960576 |
| 5 | 54875873536 |
| 6 | 208827064576 |
| 7 | 656100000000 |
| 8 | 1785793904896 |
| 9 | 4347792138496 |
| 10 | 9682651996416 |
| 11 | 20047612231936 |
| 12 | 39062500000000 |
| 13 | 72301961339136 |
| 14 | 128063081718016 |
| 15 | 218340105584896 |
| 16 | 360040606269696 |
| 17 | 576480100000000 |
| 18 | 899194740203776 |