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 | 27 |
| 3 | 81 |
| 4 | 125 |
| 5 | 6561 |
| 6 | 24389 |
| 7 | 59049 |
| 8 | 161051 |
| 9 | 357911 |
| 10 | 571787 |
| 11 | 1442897 |
| 12 | 4782969 |
| 13 | 5177717 |
| 14 | 14348907 |
| 15 | 18191447 |
| 16 | 30080231 |
| 17 | 73560059 |
| 18 | 80062991 |
| 19 | 118370771 |
| 20 | 127263527 |
| 21 | 131872229 |
| 22 | 318611987 |
| 23 | 344472101 |
| 24 | 440711081 |
| 25 | 461889917 |
| 26 | 590589719 |
| 27 | 756058031 |
| 28 | 865523177 |