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 | 11 |
| 2 | 83 |
| 3 | 6563 |
| 4 | 43046723 |
| 5 | 1853020188851843 |
| 6 | 3433683820292512484657849089283 |
| 7 | 11790184577738583171520872861412518665678211592275841109096963 |