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 | 2 |
| 2 | 5 |
| 3 | 22 |
| 4 | 221 |
| 5 | 5556 |
| 6 | 352897 |
| 7 | 56909000 |
| 8 | 23456163817 |
| 9 | 24862388706622 |
| 10 | 68125408037874461 |
| 11 | 484697617517152241192 |
| 12 | 8987761653844408528516645 |
| 13 | 435751632681268773059903563592 |
| 14 | 55389930392445599773550918556967161 |