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 | 4 |
| 2 | 6 |
| 3 | 60 |
| 4 | 270 |
| 5 | 1950 |
| 6 | 3000 |
| 7 | 6360 |
| 8 | 11490 |
| 9 | 11550 |
| 10 | 14550 |
| 11 | 18540 |
| 12 | 19890 |
| 13 | 21840 |
| 14 | 31080 |
| 15 | 32910 |
| 16 | 32970 |
| 17 | 33330 |
| 18 | 33600 |
| 19 | 42570 |
| 20 | 42840 |
| 21 | 50460 |
| 22 | 53550 |
| 23 | 58110 |
| 24 | 68880 |
| 25 | 70200 |
| 26 | 74610 |
| 27 | 79230 |
| 28 | 80910 |
| 29 | 93810 |
| 30 | 96330 |
| 31 | 98910 |
| 32 | 104310 |
| 33 | 109140 |
| 34 | 114600 |
| 35 | 121020 |
| 36 | 125790 |