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) |
|---|---|
| 0 | 3 |
| 1 | 14 |
| 2 | 611 |
| 3 | 1346270 |
| 4 | 6557470319843 |
| 5 | 155576970220531065681649694 |
| 6 | 87571595343018854458033386304178158174356588264390371 |