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 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 5 |
| 5 | 65 |
| 6 | 6529 |
| 7 | 136091233 |
| 8 | 41625259047416909 |
| 9 | 2189507051227161558033650829868135 |
| 10 | 75931290362065676573711484986356332365619562746656079489987281066955 |