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 | 2 |
| 2 | 6 |
| 3 | 4 |
| 4 | 30 |
| 5 | 4 |
| 6 | 84 |
| 7 | 24 |
| 8 | 90 |
| 9 | 20 |
| 10 | 132 |
| 11 | 8 |
| 12 | 5460 |
| 13 | 840 |
| 14 | 360 |
| 15 | 48 |
| 16 | 1530 |
| 17 | 4 |
| 18 | 1596 |
| 19 | 168 |
| 20 | 1980 |
| 21 | 1320 |
| 22 | 8280 |
| 23 | 80 |
| 24 | 81900 |
| 25 | 6552 |
| 26 | 1512 |
| 27 | 112 |
| 28 | 3480 |
| 29 | 80 |
| 30 | 114576 |
| 31 | 7392 |
| 32 | 117810 |
| 33 | 7140 |
| 34 | 1260 |
| 35 | 8 |
| 36 | 3838380 |
| 37 | 5928 |
| 38 | 936 |
| 39 | 48 |
| 40 | 81180 |
| 41 | 440 |
| 42 | 1191960 |
| 43 | 55440 |
| 44 | 869400 |
| 45 | 38640 |
| 46 | 236880 |
| 47 | 224 |