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 | 7 |
| 2 | 239 |
| 3 | 159667199 |
| 4 | 6974263295999 |
| 5 | 2947253997913233984847871999999 |
| 6 | 98410933013201380282539536547839999999 |
| 7 | 20138421021124611879118377356171332502421503999999999 |