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 | 0 |
| 1 | 3 |
| 2 | 12 |
| 3 | 21 |
| 4 | 48 |
| 5 | 57 |
| 6 | 84 |
| 7 | 111 |
| 8 | 192 |
| 9 | 201 |
| 10 | 228 |
| 11 | 255 |
| 12 | 336 |
| 13 | 363 |
| 14 | 444 |
| 15 | 525 |
| 16 | 768 |
| 17 | 777 |
| 18 | 804 |
| 19 | 831 |
| 20 | 912 |
| 21 | 939 |
| 22 | 1020 |
| 23 | 1101 |
| 24 | 1344 |
| 25 | 1371 |
| 26 | 1452 |
| 27 | 1533 |
| 28 | 1776 |
| 29 | 1857 |
| 30 | 2100 |
| 31 | 2343 |
| 32 | 3072 |
| 33 | 3081 |
| 34 | 3108 |
| 35 | 3135 |
| 36 | 3216 |
| 37 | 3243 |
| 38 | 3324 |
| 39 | 3405 |
| 40 | 3648 |
| 41 | 3675 |
| 42 | 3756 |
| 43 | 3837 |
| 44 | 4080 |
| 45 | 4161 |
| 46 | 4404 |
| 47 | 4647 |