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 | 6 |
| 2 | 6 |
| 3 | 60 |
| 4 | 10 |
| 5 | 252 |
| 6 | 84 |
| 7 | 360 |
| 8 | 90 |
| 9 | 660 |
| 10 | 44 |
| 11 | 32760 |
| 12 | 5460 |
| 13 | 2520 |
| 14 | 360 |
| 15 | 12240 |
| 16 | 34 |
| 17 | 14364 |
| 18 | 1596 |
| 19 | 19800 |
| 20 | 13860 |
| 21 | 91080 |
| 22 | 920 |
| 23 | 982800 |
| 24 | 81900 |
| 25 | 19656 |
| 26 | 1512 |
| 27 | 48720 |
| 28 | 1160 |
| 29 | 1718640 |
| 30 | 114576 |
| 31 | 1884960 |
| 32 | 117810 |
| 33 | 21420 |
| 34 | 140 |
| 35 | 69090840 |
| 36 | 109668 |
| 37 | 17784 |
| 38 | 936 |
| 39 | 1623600 |
| 40 | 9020 |