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) |
|---|---|
| 1 | 0 |
| 2 | 2 |
| 3 | 114 |
| 4 | 9602 |
| 5 | 2103570 |
| 6 | 1465969442 |
| 7 | 3767396928834 |
| 8 | 38267690721261122 |
| 9 | 1543992652549401346770 |
| 10 | 246181774152151716764436962 |
| 11 | 154911195038079578918382192282114 |
| 12 | 384894219829087015520536416987293088002 |
| 13 | 3779926606713983438336679626484814602924257490 |