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) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 5 |
| 3 | 9 |
| 4 | 15 |
| 5 | 25 |
| 6 | 27 |
| 7 | 45 |
| 8 | 75 |
| 9 | 125 |
| 10 | 81 |
| 11 | 135 |
| 12 | 225 |
| 13 | 375 |
| 14 | 625 |
| 15 | 243 |
| 16 | 405 |
| 17 | 675 |
| 18 | 1125 |
| 19 | 1875 |
| 20 | 3125 |
| 21 | 729 |
| 22 | 1215 |
| 23 | 2025 |
| 24 | 3375 |
| 25 | 5625 |
| 26 | 9375 |
| 27 | 15625 |
| 28 | 2187 |
| 29 | 3645 |
| 30 | 6075 |
| 31 | 10125 |
| 32 | 16875 |
| 33 | 28125 |
| 34 | 46875 |
| 35 | 78125 |
| 36 | 6561 |
| 37 | 10935 |
| 38 | 18225 |
| 39 | 30375 |
| 40 | 50625 |
| 41 | 84375 |
| 42 | 140625 |
| 43 | 234375 |