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 | 288 |
| 4 | 1024 |
| 5 | 2560 |
| 6 | 6400 |
| 7 | 13200 |
| 8 | 27225 |
| 9 | 49665 |
| 10 | 90601 |
| 11 | 151704 |
| 12 | 254016 |
| 13 | 399168 |
| 14 | 627264 |
| 15 | 938520 |
| 16 | 1404225 |
| 17 | 2020425 |
| 18 | 2907025 |
| 19 | 4051080 |
| 20 | 5645376 |
| 21 | 7660224 |
| 22 | 10394176 |
| 23 | 13789048 |
| 24 | 18292729 |
| 25 | 23801505 |
| 26 | 30969225 |
| 27 | 39622800 |
| 28 | 50694400 |
| 29 | 63909120 |
| 30 | 80568576 |