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 | 9 |
| 2 | 54 |
| 3 | 72 |
| 4 | 126 |
| 5 | 189 |
| 6 | 243 |
| 7 | 351 |
| 8 | 432 |
| 9 | 468 |
| 10 | 513 |
| 11 | 576 |
| 12 | 756 |
| 13 | 855 |
| 14 | 945 |
| 15 | 1008 |
| 16 | 1125 |
| 17 | 1332 |
| 18 | 1395 |
| 19 | 1458 |
| 20 | 1512 |
| 21 | 1674 |
| 22 | 1755 |
| 23 | 1944 |
| 24 | 2205 |
| 25 | 2322 |
| 26 | 2331 |
| 27 | 2457 |
| 28 | 2709 |
| 29 | 2745 |
| 30 | 2808 |
| 31 | 3087 |
| 32 | 3402 |
| 33 | 3456 |
| 34 | 3528 |
| 35 | 3591 |
| 36 | 3744 |
| 37 | 4104 |
| 38 | 4221 |
| 39 | 4608 |
| 40 | 4914 |
| 41 | 4941 |