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 | 3 |
| 2 | 9 |
| 3 | 163 |
| 4 | 8363 |
| 5 | 1348399 |
| 6 | 644993621 |
| 7 | 912173011699 |
| 8 | 3856478543303029 |
| 9 | 48316904515484808101 |
| 10 | 1799376234322670301407483 |