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 | 15 |
| 2 | 45 |
| 3 | 75 |
| 4 | 135 |
| 5 | 225 |
| 6 | 375 |
| 7 | 405 |
| 8 | 675 |
| 9 | 1125 |
| 10 | 1215 |
| 11 | 1875 |
| 12 | 2025 |
| 13 | 3375 |
| 14 | 3645 |
| 15 | 5625 |
| 16 | 6075 |
| 17 | 9375 |
| 18 | 10125 |
| 19 | 10935 |
| 20 | 16875 |
| 21 | 18225 |
| 22 | 28125 |
| 23 | 30375 |
| 24 | 32805 |
| 25 | 46875 |
| 26 | 50625 |
| 27 | 54675 |
| 28 | 84375 |
| 29 | 91125 |
| 30 | 98415 |
| 31 | 140625 |
| 32 | 151875 |
| 33 | 164025 |
| 34 | 234375 |
| 35 | 253125 |
| 36 | 273375 |
| 37 | 295245 |