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 | 5 |
| 4 | 9 |
| 5 | 15 |
| 6 | 25 |
| 7 | 27 |
| 8 | 45 |
| 9 | 75 |
| 10 | 81 |
| 11 | 125 |
| 12 | 135 |
| 13 | 171 |
| 14 | 183 |
| 15 | 225 |
| 16 | 243 |
| 17 | 355 |
| 18 | 375 |
| 19 | 405 |
| 20 | 505 |
| 21 | 513 |
| 22 | 549 |
| 23 | 625 |
| 24 | 675 |
| 25 | 729 |
| 26 | 855 |
| 27 | 915 |
| 28 | 1065 |
| 29 | 1125 |
| 30 | 1215 |
| 31 | 1515 |
| 32 | 1539 |
| 33 | 1647 |
| 34 | 1775 |
| 35 | 1875 |
| 36 | 2025 |
| 37 | 2187 |
| 38 | 2525 |
| 39 | 2565 |
| 40 | 2745 |
| 41 | 3125 |
| 42 | 3195 |
| 43 | 3249 |
| 44 | 3375 |
| 45 | 3645 |
| 46 | 4275 |
| 47 | 4545 |