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 | 1 |
| 2 | 9 |
| 3 | 187 |
| 4 | 7173 |
| 5 | 440611 |
| 6 | 39631509 |
| 7 | 4910795107 |
| 8 | 802015652853 |
| 9 | 166948755155971 |
| 10 | 43146953460348309 |
| 11 | 13555255072473665827 |
| 12 | 5087595330217093070133 |
| 13 | 2248298922174973220446531 |
| 14 | 1155512971750307157457879509 |
| 15 | 683392198848998191062416885347 |