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 | 30 |
| 2 | 190 |
| 3 | 860 |
| 4 | 2640 |
| 5 | 6730 |
| 6 | 14730 |
| 7 | 29060 |
| 8 | 52900 |
| 9 | 90390 |
| 10 | 146610 |
| 11 | 228000 |
| 12 | 342120 |
| 13 | 498030 |
| 14 | 706270 |
| 15 | 979100 |
| 16 | 1330440 |
| 17 | 1776250 |
| 18 | 2334330 |
| 19 | 3024740 |
| 20 | 3869740 |
| 21 | 4893990 |
| 22 | 6124530 |
| 23 | 7591200 |
| 24 | 9326400 |
| 25 | 11365470 |
| 26 | 13746670 |
| 27 | 16511420 |
| 28 | 19704240 |
| 29 | 23373130 |