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 | 4 |
| 4 | 9 |
| 5 | 12 |
| 6 | 13 |
| 7 | 27 |
| 8 | 36 |
| 9 | 39 |
| 10 | 40 |
| 11 | 81 |
| 12 | 108 |
| 13 | 117 |
| 14 | 120 |
| 15 | 121 |
| 16 | 243 |
| 17 | 324 |
| 18 | 351 |
| 19 | 360 |
| 20 | 363 |
| 21 | 364 |
| 22 | 729 |
| 23 | 972 |
| 24 | 1053 |
| 25 | 1080 |
| 26 | 1089 |
| 27 | 1092 |
| 28 | 1093 |
| 29 | 2187 |
| 30 | 2916 |
| 31 | 3159 |
| 32 | 3240 |
| 33 | 3267 |
| 34 | 3276 |
| 35 | 3279 |
| 36 | 3280 |
| 37 | 6561 |
| 38 | 8748 |
| 39 | 9477 |
| 40 | 9720 |
| 41 | 9801 |
| 42 | 9828 |
| 43 | 9837 |
| 44 | 9840 |
| 45 | 9841 |
| 46 | 19683 |
| 47 | 26244 |
| 48 | 28431 |