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 | 1 |
| 2 | 1536 |
| 3 | 118098 |
| 4 | 2621440 |
| 5 | 29296875 |
| 6 | 211631616 |
| 7 | 1129900996 |
| 8 | 4831838208 |
| 9 | 17433922005 |
| 10 | 55000000000 |
| 11 | 155624547606 |
| 12 | 402462867456 |
| 13 | 965009442943 |
| 14 | 2169409912320 |
| 15 | 4613203125000 |
| 16 | 9345848836096 |
| 17 | 18143945104041 |