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 | 255255 |
| 2 | 765765 |
| 3 | 1276275 |
| 4 | 1786785 |
| 5 | 2297295 |
| 6 | 2807805 |
| 7 | 3318315 |
| 8 | 3828825 |
| 9 | 4339335 |
| 10 | 5360355 |
| 11 | 6381375 |
| 12 | 6891885 |
| 13 | 8423415 |
| 14 | 8933925 |
| 15 | 9954945 |
| 16 | 11486475 |
| 17 | 12507495 |
| 18 | 13018005 |
| 19 | 14039025 |
| 20 | 16081065 |
| 21 | 16591575 |
| 22 | 19144125 |
| 23 | 19654635 |
| 24 | 20675655 |
| 25 | 21696675 |
| 26 | 23228205 |
| 27 | 25270245 |
| 28 | 26801775 |