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 | 0 |
| 1 | 0 |
| 2 | 16 |
| 3 | 531 |
| 4 | 22737 |
| 5 | 1681647 |
| 6 | 233613750 |
| 7 | 62845739144 |
| 8 | 33198078319112 |
| 9 | 34686509192360823 |
| 10 | 71978712930766793223 |