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 | 3 |
| 2 | 6 |
| 3 | 36 |
| 4 | 66 |
| 5 | 300 |
| 6 | 630 |
| 7 | 666 |
| 8 | 3003 |
| 9 | 66066 |
| 10 | 333336 |
| 11 | 600060 |
| 12 | 630003 |
| 13 | 3306306 |
| 14 | 30330366 |
| 15 | 330360660 |
| 16 | 6603360660 |
| 17 | 63630666636636 |
| 18 | 633663606306030 |
| 19 | 63033033630030366 |
| 20 | 66000033300360030336 |
| 21 | 33363363630036306006003 |
| 22 | 363003633036606030300000 |
| 23 | 663300330303660363306006 |