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 | 3 |
| 3 | 9 |
| 4 | 11 |
| 5 | 21 |
| 6 | 27 |
| 7 | 39 |
| 8 | 49 |
| 9 | 71 |
| 10 | 81 |
| 11 | 121 |
| 12 | 131 |
| 13 | 241 |
| 14 | 243 |
| 15 | 343 |
| 16 | 441 |
| 17 | 443 |
| 18 | 729 |
| 19 | 815 |
| 20 | 1331 |
| 21 | 1499 |
| 22 | 1521 |
| 23 | 2187 |
| 24 | 2401 |
| 25 | 2757 |
| 26 | 5041 |
| 27 | 5071 |
| 28 | 6561 |
| 29 | 9261 |
| 30 | 9327 |
| 31 | 14641 |
| 32 | 16807 |
| 33 | 17155 |
| 34 | 17161 |
| 35 | 19683 |
| 36 | 31553 |
| 37 | 58035 |
| 38 | 58081 |
| 39 | 59049 |
| 40 | 59319 |
| 41 | 106743 |
| 42 | 117649 |
| 43 | 161051 |
| 44 | 177147 |