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 | 7 |
| 3 | 131 |
| 4 | 10012 |
| 5 | 2810694 |
| 6 | 2989126727 |
| 7 | 11945257052321 |
| 8 | 179788343101980135 |
| 9 | 10185111919160666118608 |
| 10 | 2172138783673094193937750015 |
| 11 | 1743829823240164494694386437970640 |
| 12 | 5270137993816086266962874395450234534887 |
| 13 | 59956919824257750508655631107474672284499736089 |