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) |
|---|---|
| 1 | 1 |
| 2 | 15 |
| 3 | 375 |
| 4 | 13125 |
| 5 | 590625 |
| 6 | 32484375 |
| 7 | 2111484375 |
| 8 | 158361328125 |
| 9 | 13460712890625 |
| 10 | 1278767724609375 |
| 11 | 134270611083984375 |
| 12 | 15441120274658203125 |
| 13 | 1930140034332275390625 |
| 14 | 260568904634857177734375 |
| 15 | 37782491172054290771484375 |
| 16 | 5856286131668415069580078125 |