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 | 2 |
| 2 | 2 |
| 3 | 2 |
| 4 | 2 |
| 5 | 11 |
| 6 | 13 |
| 7 | 115571 |
| 8 | 23586221 |
| 9 | 53165771 |
| 10 | 3398453717 |
| 11 | 615502598677 |
| 12 | 32504183957101 |
| 13 | 164289842304587 |