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 | 6 |
| 3 | 14 |
| 4 | 30 |
| 5 | 62 |
| 6 | 90 |
| 7 | 126 |
| 8 | 254 |
| 9 | 510 |
| 10 | 1022 |
| 11 | 2046 |
| 12 | 4094 |
| 13 | 8190 |