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 | 121 |
| 4 | 2161 |
| 5 | 48081 |
| 6 | 1279801 |
| 7 | 39631369 |
| 8 | 1398961761 |
| 9 | 55422807841 |
| 10 | 2434261023721 |
| 11 | 117366299630361 |
| 12 | 6161301265353169 |
| 13 | 349768597919934961 |
| 14 | 21347094823271661081 |
| 15 | 1393695557886847095721 |
| 16 | 96910923898115717350081 |
| 17 | 7149718240571434690591809 |