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 | 6 |
| 3 | 54 |
| 4 | 135 |
| 5 | 486 |
| 6 | 495 |
| 7 | 516 |
| 8 | 1134 |
| 9 | 1863 |
| 10 | 2295 |
| 11 | 3375 |
| 12 | 4374 |
| 13 | 4875 |
| 14 | 5535 |
| 15 | 10935 |
| 16 | 11875 |
| 17 | 15435 |
| 18 | 19695 |
| 19 | 22295 |
| 20 | 23625 |
| 21 | 24057 |
| 22 | 34853 |
| 23 | 39015 |
| 24 | 39366 |
| 25 | 42875 |
| 26 | 43875 |
| 27 | 59265 |
| 28 | 64881 |
| 29 | 77625 |
| 30 | 84375 |
| 31 | 89667 |
| 32 | 100875 |
| 33 | 102375 |
| 34 | 114582 |
| 35 | 122625 |
| 36 | 142155 |
| 37 | 144495 |
| 38 | 161325 |
| 39 | 165375 |
| 40 | 205979 |
| 41 | 251505 |
| 42 | 268569 |