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 | 53 |
| 2 | 113 |
| 3 | 16433 |
| 4 | 262193 |
| 5 | 4194353 |
| 6 | 67108913 |
| 7 | 5846006549323611672814739330865132078623730171953 |
| 8 | 1496577676626844588240573268701473812127674924007473 |