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 | 3 |
| 2 | 409 |
| 3 | 6553 |
| 4 | 1677721 |
| 5 | 6871947673 |
| 6 | 472236648286964521369 |
| 7 | 7922816251426433759354395033 |
| 8 | 2451992865385422173373355243440494693789982595493763481 |