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 | 0 |
| 2 | 9 |
| 3 | 15 |
| 4 | 42 |
| 5 | 54 |
| 6 | 99 |
| 7 | 117 |
| 8 | 180 |
| 9 | 204 |
| 10 | 285 |
| 11 | 315 |
| 12 | 414 |
| 13 | 450 |
| 14 | 567 |
| 15 | 609 |
| 16 | 744 |
| 17 | 792 |
| 18 | 945 |
| 19 | 999 |
| 20 | 1170 |
| 21 | 1230 |
| 22 | 1419 |
| 23 | 1485 |
| 24 | 1692 |
| 25 | 1764 |
| 26 | 1989 |
| 27 | 2067 |
| 28 | 2310 |
| 29 | 2394 |
| 30 | 2655 |
| 31 | 2745 |
| 32 | 3024 |
| 33 | 3120 |
| 34 | 3417 |
| 35 | 3519 |
| 36 | 3834 |
| 37 | 3942 |
| 38 | 4275 |
| 39 | 4389 |
| 40 | 4740 |
| 41 | 4860 |
| 42 | 5229 |
| 43 | 5355 |
| 44 | 5742 |
| 45 | 5874 |
| 46 | 6279 |
| 47 | 6417 |