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 | 5 |
| 2 | 7 |
| 3 | 11 |
| 4 | 29 |
| 5 | 31 |
| 6 | 59 |
| 7 | 61 |
| 8 | 127 |
| 9 | 251 |
| 10 | 509 |
| 11 | 1019 |
| 12 | 1021 |
| 13 | 262139 |
| 14 | 1048571 |
| 15 | 2147483647 |