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) |
|---|---|
| 11 | 1953125 |
| 12 | 9765625 |
| 13 | 58593750 |
| 14 | 976562500 |
| 15 | 4687500000000 |
| 16 | 1687500000000000 |
| 17 | 22500000000000000 |
| 18 | 75000000000000000 |
| 19 | 194400000000000000000 |