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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 3 |
| 5 | 1 |
| 6 | 1 |
| 7 | 7 |
| 8 | 12 |
| 9 | 1 |
| 10 | 1 |
| 11 | 15 |
| 12 | 50 |
| 13 | 264 |
| 14 | 1 |
| 15 | 1 |
| 16 | 31 |
| 17 | 180 |
| 18 | 1920 |
| 19 | 11970 |
| 20 | 1 |
| 21 | 1 |
| 22 | 63 |
| 23 | 602 |
| 24 | 11760 |
| 25 | 146160 |
| 26 | 1689600 |
| 27 | 1 |
| 28 | 1 |
| 29 | 127 |
| 30 | 1932 |
| 31 | 66024 |
| 32 | 1477980 |
| 33 | 34214400 |
| 34 | 603233280 |
| 35 | 1 |
| 36 | 1 |
| 37 | 255 |
| 38 | 6050 |
| 39 | 353304 |
| 40 | 13556970 |
| 41 | 568656000 |
| 42 | 20043279360 |
| 43 | 586244602944 |
| 44 | 1 |