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 | 135 |
| 2 | 255 |
| 3 | 459 |
| 4 | 465 |
| 5 | 765 |
| 6 | 837 |
| 7 | 855 |
| 8 | 1395 |
| 9 | 1539 |
| 10 | 1575 |
| 11 | 1581 |
| 12 | 2565 |
| 13 | 2635 |
| 14 | 2835 |
| 15 | 2895 |
| 16 | 2907 |
| 17 | 4725 |
| 18 | 4743 |
| 19 | 4845 |
| 20 | 5211 |
| 21 | 5301 |
| 22 | 5325 |
| 23 | 5355 |
| 24 | 8685 |
| 25 | 8721 |
| 26 | 8835 |
| 27 | 8925 |
| 28 | 9585 |
| 29 | 9765 |
| 30 | 9795 |
| 31 | 9843 |
| 32 | 15903 |
| 33 | 15975 |
| 34 | 16065 |
| 35 | 16275 |
| 36 | 16405 |
| 37 | 17631 |
| 38 | 17949 |
| 39 | 17955 |
| 40 | 18015 |
| 41 | 18105 |
| 42 | 29295 |