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 | 9 |
| 2 | 81 |
| 3 | 169 |
| 4 | 361 |
| 5 | 841 |
| 6 | 2025 |
| 7 | 5041 |
| 8 | 12769 |
| 9 | 32761 |
| 10 | 84681 |
| 11 | 219961 |
| 12 | 573049 |
| 13 | 1495729 |
| 14 | 3908529 |
| 15 | 10220809 |
| 16 | 26739241 |
| 17 | 69973225 |
| 18 | 183142089 |
| 19 | 479391025 |
| 20 | 1254930625 |
| 21 | 3285238489 |
| 22 | 8600522121 |
| 23 | 22515902809 |
| 24 | 58946498521 |
| 25 | 154322479921 |
| 26 | 404019140625 |