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 | 12 |
| 3 | 163 |
| 4 | 3411 |
| 5 | 97164 |
| 6 | 3576001 |
| 7 | 163701521 |
| 8 | 9064712524 |
| 9 | 594288068019 |
| 10 | 45352945127123 |
| 11 | 3973596101084108 |
| 12 | 395147058261233761 |
| 13 | 44170986458602383553 |
| 14 | 5504694207040057913164 |
| 15 | 759355292729159336345955 |
| 16 | 115228949414563130433140659 |
| 17 | 19129024114529146183236435660 |