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 | 4 |
| 3 | 1 |
| 4 | 36 |
| 5 | 4 |
| 6 | 1 |
| 7 | 504 |
| 8 | 52 |
| 9 | 4 |
| 10 | 1 |
| 11 | 9576 |
| 12 | 648 |
| 13 | 52 |
| 14 | 4 |
| 15 | 1 |
| 16 | 229824 |
| 17 | 12888 |
| 18 | 712 |
| 19 | 52 |
| 20 | 4 |
| 21 | 1 |
| 22 | 6664896 |
| 23 | 286272 |
| 24 | 13464 |
| 25 | 712 |
| 26 | 52 |
| 27 | 4 |
| 28 | 1 |
| 29 | 226606464 |
| 30 | 8182944 |
| 31 | 299520 |
| 32 | 13720 |
| 33 | 712 |
| 34 | 52 |
| 35 | 4 |
| 36 | 1 |
| 37 | 8837652096 |
| 38 | 266366016 |
| 39 | 8455392 |
| 40 | 301824 |
| 41 | 13720 |
| 42 | 712 |
| 43 | 52 |
| 44 | 4 |
| 45 | 1 |
| 46 | 388856692224 |
| 47 | 10191545280 |
| 48 | 273091392 |