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 | 5 |
| 2 | 36 |
| 3 | 3406 |
| 4 | 14694817 |
| 5 | 727050997716715 |
| 6 | 2074744506784679417243551677046 |
| 7 | 46045625970633183674340934067371917846908361831894602280765110 |