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 | 5 |
| 3 | 13 |
| 4 | 83 |
| 5 | 2707 |
| 6 | 71475193 |
| 7 | 674721797 |
| 8 | 6245693407 |
| 9 | 118543624847 |
| 10 | 82736199371081 |
| 11 | 72298621492552303967009812018997 |
| 12 | 2454725173623452943975951834280921 |
| 13 | 59966692897276736774965300014477948187539553 |