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 | 0 |
| 2 | 1 |
| 3 | 22 |
| 4 | 3935 |
| 5 | 1497568 |
| 6 | 883538845 |
| 7 | 725601878962 |
| 8 | 792072162839065 |
| 9 | 1110677779035583912 |
| 10 | 1947266694667001733208 |
| 11 | 4175906998639267840682727 |
| 12 | 10757238370963150080155796720 |
| 13 | 32785728540392233760236496299048 |
| 14 | 116709223477757580428169966318431329 |