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 | 7 |
| 3 | 13 |
| 4 | 167 |
| 5 | 1843406868619 |
| 6 | 567512739603223 |
| 7 | 1125599723626314594798370059933052227890281327798090340341843 |