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 | 63855 |
| 3 | 776600 |
| 4 | 3825360 |
| 5 | 4809024 |
| 6 | 25530120 |
| 7 | 570240 |
| 8 | 29937600 |
| 9 | 26611200 |
| 10 | 25945920 |
| 11 | 43545600 |
| 12 | 21621600 |
| 13 | 0 |
| 14 | 8553600 |
| 15 | 6652800 |
| 16 | 0 |
| 17 | 0 |
| 18 | 0 |
| 19 | 0 |
| 20 | 11975040 |
| 21 | 11404800 |
| 22 | 0 |
| 23 | 0 |
| 24 | 0 |
| 25 | 0 |
| 26 | 0 |
| 27 | 0 |
| 28 | 0 |
| 29 | 0 |
| 30 | 3991680 |
| 31 | 0 |
| 32 | 0 |
| 33 | 0 |
| 34 | 0 |
| 35 | 13685760 |