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 | 243 |
| 2 | 405 |
| 3 | 567 |
| 4 | 675 |
| 5 | 891 |
| 6 | 945 |
| 7 | 1053 |
| 8 | 1125 |
| 9 | 1323 |
| 10 | 1377 |
| 11 | 1485 |
| 12 | 1539 |
| 13 | 1575 |
| 14 | 1755 |
| 15 | 1863 |
| 16 | 1875 |
| 17 | 2079 |
| 18 | 2205 |
| 19 | 2295 |
| 20 | 2349 |
| 21 | 2457 |
| 22 | 2475 |
| 23 | 2511 |
| 24 | 2565 |
| 25 | 2625 |
| 26 | 2925 |
| 27 | 2997 |
| 28 | 3087 |
| 29 | 3105 |
| 30 | 3125 |
| 31 | 3213 |
| 32 | 3267 |
| 33 | 3321 |
| 34 | 3465 |
| 35 | 3483 |
| 36 | 3591 |
| 37 | 3675 |
| 38 | 3807 |
| 39 | 3825 |
| 40 | 3861 |
| 41 | 3915 |
| 42 | 4095 |
| 43 | 4125 |