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 | 61 |
| 3 | 3841 |
| 4 | 14760961 |
| 5 | 217885999165441 |
| 6 | 47474308632322991920487055361 |
| 7 | 2253809980117057347661794063813616885861274573005652951041 |