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 | 1 |
| 2 | 7 |
| 3 | 7 |
| 4 | 49 |
| 5 | 301 |
| 6 | 49 |
| 7 | 343 |
| 8 | 12943 |
| 9 | 12943 |
| 10 | 343 |
| 11 | 2401 |
| 12 | 556549 |
| 13 | 3418807 |
| 14 | 556549 |
| 15 | 2401 |
| 16 | 16807 |
| 17 | 23931607 |
| 18 | 903055069 |
| 19 | 903055069 |
| 20 | 23931607 |
| 21 | 16807 |
| 22 | 117649 |
| 23 | 1029059101 |
| 24 | 238535974201 |
| 25 | 1465295106499 |
| 26 | 238535974201 |
| 27 | 1029059101 |
| 28 | 117649 |
| 29 | 823543 |