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 | 4 |
| 2 | 126 |
| 3 | 12 |
| 4 | 4 |
| 5 | 780 |
| 6 | 94036996914 |
| 7 | 56 |
| 8 | 8 |
| 9 | 9 |
| 10 | 1111111110 |
| 11 | 132 |
| 12 | 12 |
| 13 | 30940 |
| 14 | 8108730 |
| 15 | 240 |
| 16 | 16 |
| 17 | 306 |
| 18 | 18 |
| 19 | 380 |
| 20 | 20 |
| 21 | 204204 |
| 22 | 11154 |
| 23 | 552 |
| 24 | 24 |
| 25 | 25 |
| 26 | 702 |
| 27 | 27 |
| 28 | 28 |
| 29 | 732540 |
| 30 | 27930 |
| 31 | 992 |
| 32 | 32 |
| 33 | 1222980 |
| 34 | 62556901638174 |
| 35 | 1260 |
| 36 | 36 |
| 37 | 1926220 |
| 38 | 2141490 |
| 39 | 1560 |
| 40 | 40 |
| 41 | 2896404 |