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 | 5 |
| 2 | 15 |
| 3 | 235 |
| 4 | 485 |
| 5 | 1885 |
| 6 | 5765 |
| 7 | 15885 |
| 8 | 50235 |
| 9 | 57665 |
| 10 | 72335 |
| 11 | 1798765 |
| 12 | 15249765 |
| 13 | 187703365 |
| 14 | 179876492415 |
| 15 | 159789024443333515 |
| 16 | 576387476638096486959455635 |