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 | 1 |
| 1 | 5 |
| 2 | 65 |
| 3 | 1205 |
| 4 | 26465 |
| 5 | 628805 |
| 6 | 15424865 |
| 7 | 382964405 |
| 8 | 9550195265 |
| 9 | 238539648005 |
| 10 | 5961554097665 |
| 11 | 149021418519605 |
| 12 | 3725378557692065 |
| 13 | 93133051794619205 |
| 14 | 2328313585536338465 |
| 15 | 58207725254446186805 |
| 16 | 1455192101905494196865 |