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) |
|---|---|
| 0 | 1 |
| 1 | 127 |
| 2 | 16129 |
| 3 | 2048383 |
| 4 | 260144641 |
| 5 | 33038369407 |
| 6 | 4195872914689 |
| 7 | 532875860165503 |
| 8 | 67675234241018881 |
| 9 | 8594754748609397887 |
| 10 | 1091533853073393531649 |
| 11 | 138624799340320978519423 |
| 12 | 17605349516220764271966721 |
| 13 | 2235879388560037062539773567 |
| 14 | 283956682347124706942551243009 |