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 | 4 |
| 2 | 37 |
| 3 | 3096 |
| 4 | 13574127 |
| 5 | 239733306553235 |
| 6 | 97513053185223980902949043420 |
| 7 | 19969225922307588915237554701516633177873678175659426464707 |