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 | 6 |
| 2 | 56 |
| 3 | 681 |
| 4 | 9431 |
| 5 | 140681 |
| 6 | 2203181 |
| 7 | 35718806 |
| 8 | 594312556 |
| 9 | 10090406306 |
| 10 | 174113843806 |
| 11 | 3044524000056 |
| 12 | 53828703687556 |
| 13 | 960689055250056 |
| 14 | 17284175383375056 |
| 15 | 313147365080640681 |
| 16 | 5708299647795484431 |