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 | 1 |
| 3 | 3 |
| 4 | 5 |
| 5 | 9 |
| 6 | 21 |
| 7 | 27 |
| 8 | 81 |
| 9 | 37 |
| 10 | 81 |
| 11 | 111 |
| 12 | 297 |
| 13 | 201 |
| 14 | 243 |
| 15 | 513 |
| 16 | 1053 |
| 17 | 945 |
| 18 | 729 |
| 19 | 2187 |
| 20 | 1317 |
| 21 | 3645 |
| 22 | 365 |
| 23 | 2745 |
| 24 | 4077 |
| 25 | 2187 |
| 26 | 8829 |
| 27 | 7209 |
| 28 | 12393 |
| 29 | 2433 |
| 30 | 13257 |
| 31 | 16605 |
| 32 | 6561 |
| 33 | 34263 |
| 34 | 35397 |
| 35 | 41553 |
| 36 | 13473 |
| 37 | 59697 |
| 38 | 10155 |
| 39 | 64881 |
| 40 | 19683 |
| 41 | 44793 |
| 42 | 129033 |
| 43 | 18993 |
| 44 | 71307 |