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 | 0 |
| 1 | 40353607 |
| 2 | 20661046784 |
| 3 | 794280046581 |
| 4 | 10578455953408 |
| 5 | 78815638671875 |
| 6 | 406671383849472 |
| 7 | 1628413597910449 |
| 8 | 5416169448144896 |
| 9 | 15633814156853823 |
| 10 | 40353607000000000 |
| 11 | 95151694449171437 |
| 12 | 208215748530929664 |