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 | 945 |
| 2 | 1575 |
| 3 | 2520 |
| 4 | 1008 |
| 5 | 4500 |
| 6 | 2640 |
| 7 | 4416 |
| 8 | 51696 |
| 9 | -2592 |
| 10 | 2160 |
| 11 | 9504 |
| 12 | 5616 |
| 13 | 28080 |
| 14 | 18720 |
| 15 | -8280 |
| 16 | 24660 |
| 17 | 8100 |
| 18 | 18576 |
| 19 | 4464 |
| 20 | 15840 |
| 21 | 5184 |
| 22 | 123228 |
| 23 | 26460 |
| 24 | 25704 |
| 25 | 3024 |
| 26 | 68400 |
| 27 | 31203 |
| 28 | 31293 |
| 29 | 15264 |
| 30 | 110880 |
| 31 | 12960 |
| 32 | 9720 |
| 33 | 16200 |
| 34 | -25920 |
| 35 | 77760 |
| 36 | 35640 |
| 37 | 71880 |
| 38 | 57288 |
| 39 | 49032 |
| 40 | 97200 |