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 | 6 |
| 2 | 210 |
| 3 | 2730 |
| 4 | 10626 |
| 5 | 26970 |
| 6 | 39270 |
| 7 | 54834 |
| 8 | 74046 |
| 9 | 195054 |
| 10 | 287430 |
| 11 | 342930 |
| 12 | 474474 |
| 13 | 635970 |
| 14 | 830490 |
| 15 | 1061106 |
| 16 | 1190910 |
| 17 | 1330890 |
| 18 | 1481430 |
| 19 | 2196870 |
| 20 | 2627934 |
| 21 | 2863146 |
| 22 | 3944154 |
| 23 | 4574130 |
| 24 | 5639574 |
| 25 | 6028386 |
| 26 | 6434670 |
| 27 | 7301190 |
| 28 | 8242206 |
| 29 | 9260790 |