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 | 1 |
| 2 | 120 |
| 3 | 546 |
| 4 | 1680 |
| 5 | 2880 |
| 6 | 7812 |
| 7 | 14520 |
| 8 | 34200 |
| 9 | 40320 |
| 10 | 40320 |
| 11 | 53760 |
| 12 | 68796 |
| 13 | 63360 |
| 14 | 76608 |
| 15 | 78624 |
| 16 | 80640 |
| 17 | 89280 |
| 18 | 86400 |
| 19 | 95040 |
| 20 | 90720 |
| 21 | 129600 |
| 22 | 178560 |
| 23 | 155496 |
| 24 | 205920 |
| 25 | 214272 |
| 26 | 190080 |
| 27 | 223200 |
| 28 | 245520 |
| 29 | 241920 |
| 30 | 244800 |
| 31 | 267840 |
| 32 | 280800 |
| 33 | 259200 |
| 34 | 312480 |
| 35 | 345600 |
| 36 | 313560 |
| 37 | 393120 |
| 38 | 374976 |
| 39 | 401760 |
| 40 | 367200 |
| 41 | 464256 |